Align columns
You are encouraged to solve this task according to the task description, using any language you may know.
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Use the following text to test your programs:
Given$a$text$file$of$many$lines,$where$fields$within$a$line$ are$delineated$by$a$single$'dollar'$character,$write$a$program that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$ column$are$separated$by$at$least$one$space. Further,$allow$for$each$word$in$a$column$to$be$either$left$ justified,$right$justified,$or$center$justified$within$its$column.
Note that:
- The example input texts lines may, or may not, have trailing dollar characters.
- All columns should share the same alignment.
- Consecutive space characters produced adjacent to the end of lines are insignificant for the purposes of the task.
- Output text will be viewed in a mono-spaced font on a plain text editor or basic terminal.
- The minimum space between columns should be computed from the text and not hard-coded.
- It is not a requirement to add separating characters between or around columns.
- Metrics
- Counting
- Word frequency
- Letter frequency
- Jewels and stones
- I before E except after C
- Bioinformatics/base count
- Count occurrences of a substring
- Count how many vowels and consonants occur in a string
- Remove/replace
- XXXX redacted
- Conjugate a Latin verb
- Remove vowels from a string
- String interpolation (included)
- Strip block comments
- Strip comments from a string
- Strip a set of characters from a string
- Strip whitespace from a string -- top and tail
- Strip control codes and extended characters from a string
- Anagrams/Derangements/shuffling
- Word wheel
- ABC problem
- Sattolo cycle
- Knuth shuffle
- Ordered words
- Superpermutation minimisation
- Textonyms (using a phone text pad)
- Anagrams
- Anagrams/Deranged anagrams
- Permutations/Derangements
- Find/Search/Determine
- ABC words
- Odd words
- Word ladder
- Semordnilap
- Word search
- Wordiff (game)
- String matching
- Tea cup rim text
- Alternade words
- Changeable words
- State name puzzle
- String comparison
- Unique characters
- Unique characters in each string
- Extract file extension
- Levenshtein distance
- Palindrome detection
- Common list elements
- Longest common suffix
- Longest common prefix
- Compare a list of strings
- Longest common substring
- Find common directory path
- Words from neighbour ones
- Change e letters to i in words
- Non-continuous subsequences
- Longest common subsequence
- Longest palindromic substrings
- Longest increasing subsequence
- Words containing "the" substring
- Sum of the digits of n is substring of n
- Determine if a string is numeric
- Determine if a string is collapsible
- Determine if a string is squeezable
- Determine if a string has all unique characters
- Determine if a string has all the same characters
- Longest substrings without repeating characters
- Find words which contains all the vowels
- Find words which contain the most consonants
- Find words which contains more than 3 vowels
- Find words whose first and last three letters are equal
- Find words with alternating vowels and consonants
- Formatting
- Substring
- Rep-string
- Word wrap
- String case
- Align columns
- Literals/String
- Repeat a string
- Brace expansion
- Brace expansion using ranges
- Reverse a string
- Phrase reversals
- Comma quibbling
- Special characters
- String concatenation
- Substring/Top and tail
- Commatizing numbers
- Reverse words in a string
- Suffixation of decimal numbers
- Long literals, with continuations
- Numerical and alphabetical suffixes
- Abbreviations, easy
- Abbreviations, simple
- Abbreviations, automatic
- Song lyrics/poems/Mad Libs/phrases
- Mad Libs
- Magic 8-ball
- 99 bottles of beer
- The Name Game (a song)
- The Old lady swallowed a fly
- The Twelve Days of Christmas
- Tokenize
- Text between
- Tokenize a string
- Word break problem
- Tokenize a string with escaping
- Split a character string based on change of character
- Sequences
11l
V txt = ‘Given$a$txt$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.’
V parts = txt.split("\n").map(line -> line.rtrim(‘$’).split(‘$’))
V max_widths = [0] * parts[0].len
L(line) parts
L(word) line
max_widths[L.index] = max(max_widths[L.index], word.len)
((String, Int) -> String) ljust = (s, w) -> s‘’(‘ ’ * (w - s.len))
((String, Int) -> String) centr = (s, w) -> (‘ ’ * (w - s.len - (w I/ 2 - s.len I/ 2)))‘’s‘’(‘ ’ * (w I/ 2 - s.len I/ 2))
((String, Int) -> String) rjust = (s, w) -> (‘ ’ * (w - s.len))‘’s
L(justify) [ljust, centr, rjust]
print([‘Left’, ‘Center’, ‘Right’][L.index]‘ column-aligned output:’)
L(line) parts
L(word) line
print(justify(word, max_widths[L.index]), end' ‘ ’)
print()
print(‘- ’ * 52)
360 Assembly
* Align columns 12/04/2019
ALICOL CSECT
USING ALICOL,R13 base register
B 72(R15) skip savearea
DC 17F'0' savearea
SAVE (14,12) save previous context
ST R13,4(R15) link backward
ST R15,8(R13) link forward
LR R13,R15 set addressability
LA R8,1 i=1
DO WHILE=(C,R8,LE,=A(NI)) do r=1 to hbound(t)
LA R7,1 j=1
LA R6,L'T i=length(t)
DO WHILE=(C,R6,GE,=A(1)) do i=length(t) to 1 by -1
LR R1,R8 r
MH R1,=AL2(L'T) ~
LA R4,T-L'T(R1) t(r)
BCTR R4,0 -1
AR R4,R6 +i
MVC CI,0(R4) ci=substr(t(r),i,1)
CLI CI,C' ' if ci=' '
BE ITERI1 then iterate i
CLI CI,C'$' if ci='$'
BE ITERI1 then iterate i
LR R7,R6 j=i
B LEAVEI1 leave i
ITERI1 BCTR R6,0 i--
ENDDO , enddo i
LEAVEI1 LR R1,R8 r
MH R1,=AL2(L'T) ~
LA R4,T-L'T(R1) @t(r)
LA R2,WT @wt
LR R5,R7 j
ICM R5,B'1000',=C' ' padding
LA R3,L'T length(wt)
MVCL R2,R4 wt=substr(t(r),1,j)
LA R0,1 1
ST R0,I0 i0=1
SR R9,R9 c=0
LA R6,1 i=1
DO WHILE=(CR,R6,LE,R7) do i=1 to j
LA R4,WT-1 @wt
AR R4,R6 i
MVC CI(1),0(R4) ci=substr(wt,i,1)
IF CLI,CI,EQ,C'$' THEN if ci='$' then
BAL R14,SEQ call seq
LR R2,R6 i
LA R2,1(R2) +1
ST R2,I0 i0=i+1
ENDIF , endif
LA R6,1(R6) i++
ENDDO , enddo i
BAL R14,SEQ call seq
IF C,R9,GT,COLS THEN if c>cols then
ST R9,COLS cols=c
ENDIF , endif
LA R8,1(R8) r++
ENDDO , enddo r
LR R2,R8 r
BCTR R2,0 -1
ST R2,ROWS rows=r-1
LA R7,1 j=1
DO WHILE=(C,R7,LE,=A(3)) do j=1 to 3
XPRNT =C'--',2 print
LA R8,1 r=1
DO WHILE=(C,R8,LE,ROWS) do r=1 to rows
MVC PG,=CL120' ' pg=' '
LA R0,1 1
ST R0,IB ib=1
LA R9,1 c=1
DO WHILE=(C,R9,LE,COLS) do c=1 to cols
LR R1,R8 r
BCTR R1,0 -1
MH R1,=AL2(NJ) ~
AR R1,R9 c
MH R1,=AL2(L'WOR) ~
LA R4,WOR-L'WOR(R1) @wor(r,c)
MVC W,0(R4) w=wor(r,c)
LA R6,L'W i=length(w)
DO WHILE=(C,R6,GE,=A(1)) do i=length(w) to 1 by -1
LA R4,W-1 @w
AR R4,R6 i
MVC CI,0(R4) ci=substr(w,i,1)
CLI CI,C' ' if ci^=' '
BNE LEAVEI2 then goto leavei2;
BCTR R6,0 i--
ENDDO , enddo i
LEAVEI2 EQU * ~
IF LTR,R6,Z,R6 THEN if i=0 then
LA R10,1 l=1
ELSE , else
LR R10,R6 l=i
ENDIF , endif
IF C,R7,EQ,=F'1' THEN if j=1 then
L R11,IB ibx=ib
ENDIF , endif
IF C,R7,EQ,=F'2' THEN if j=2 then
LR R1,R9 c
SLA R1,2 ~
L R11,WID-L'WID(R1) wid(c)
A R11,IB +ib
SR R11,R10 ibx=ib+wid(c)-l
ENDIF , endif
IF C,R7,EQ,=F'3' THEN if j=3 then
LR R1,R9 c
SLA R1,2 ~
L R11,WID-L'WID(R1) wid(c)
SR R11,R10 -l
SRA R11,1 /2
A R11,IB ibx=ib+(wid(c)-l)/2
ENDIF , endif
LA R2,PG-1 @pg
AR R2,R11 +ibx
LR R3,R10 l
LA R4,W @w
LR R5,R10 l
MVCL R2,R4 substr(pg,ibx,l)=substr(w,1,l)
LR R1,R9 c
SLA R1,2 ~
L R2,WID-L'WID(R1) wid(c)
A R2,IB +ib
LA R2,1(R2) +1
ST R2,IB ib=ib+wid(c)+1
LA R9,1(R9) c++
ENDDO , enddo c
XPRNT PG,L'PG print
LA R8,1(R8) r++
ENDDO , enddo r
LA R7,1(R7) j++
ENDDO , enddo j
L R13,4(0,R13) restore previous savearea pointer
RETURN (14,12),RC=0 restore registers from calling sav
SEQ EQU * --begin seq
LA R9,1(R9) c=c+1
LR R10,R6 i
S R10,I0 l=i-i0
LA R4,WT-1 @wt
A R4,I0 +i0
LR R5,R10 l
ICM R5,B'1000',=C' ' padding
LR R1,R8 r
BCTR R1,0 -1
MH R1,=AL2(NJ) ~
AR R1,R9 +c
MH R1,=AL2(L'WOR) ~
LA R2,WOR-L'WOR(R1) @wor(r,c)
LA R3,L'WOR length(wor)
MVCL R2,R4 wor(r,c)=substr(wt,i0,l)
LR R1,R9 c
SLA R1,2 ~
L R2,WID-L'WID(R1) wid(c)
IF CR,R2,LT,R10 THEN if l>wid(c) then
LR R1,R9 c
SLA R1,2 ~
ST R10,WID-L'WID(R1) wid(c)=l
ENDIF , endif
BR R14 --end seq
NI EQU 6 ni
NJ EQU 12 nj
T DC CL68'Given$a$text$file$of$many$lines,$where$fields$within$a$line$'
DC CL68'are$delineated$by$a$single$''dollar''$character,$write$a$progX
ramm'
DC CL68'that$aligns$each$column$of$fields$by$ensuring$that$words$in$eX
ach$'
DC CL68'column$are$separated$by$at$least$one$space.'
DC CL68'Further,$allow$for$each$word$in$a$column$to$be$either$left$'
DC CL68'justified,$right$justified,$or$center$justified$within$its$coX
lumn.'
WOR DC (NI*NJ)CL10' ' wor(ni,nj) char(10)
WID DC 16F'0' wid(16)
COLS DC F'0'
ROWS DC F'0'
WT DS CL(L'T)
W DS CL(L'WOR)
CI DS CL1
I0 DS F
IB DS F
PG DS CL120
REGEQU
END ALICOL
- Output:
-- Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a programm that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. -- Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a programm that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. -- Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a programm that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
8th
quote | Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.|
var, raw-text
[] var, data
var width
: read-and-parse \ --
raw-text @
( "$" s:/ data @ swap a:push drop )
s:eachline ;
: find-widest \ -- n
data @ ( ( swap s:len nip n:max ) swap a:reduce ) 0 a:reduce ;
: print-data \ fmt --
width @ swap s:strfmt >r
data @
(
nip
(
nip
r@ s:strfmt .
) a:each drop
cr
) a:each drop rdrop ;
: app:main
read-and-parse
\ find widest column, and add one for the space:
find-widest n:1+ width !
\ print the data
cr "right:" . cr "%%>%ds" print-data
cr "left:" . cr "%%<%ds" print-data
cr "center:" . cr "%%|%ds" print-data
bye ;
- Output:
right: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. left: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. center: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
AArch64 Assembly
/* ARM assembly AARCH64 Raspberry PI 3B or android 64 bits */
/* program alignColumn64.s */
/*******************************************/
/* Constantes file */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeConstantesARM64.inc"
.equ BUFFERSIZE, 16 * 10
/*********************************/
/* Initialized data */
/*********************************/
.data
szMessLeft: .asciz "LEFT :\n"
szMessRight: .asciz "\nRIGHT :\n"
szMessCenter: .asciz "\nCENTER :\n"
szCarriageReturn: .asciz "\n"
szLine1: .asciz "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
szLine2: .asciz "are$delineated$by$a$single$'dollar'$character,$write$a$program"
szLine3: .asciz "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
szLine4: .asciz "column$are$separated$by$at$least$one$space."
szLine5: .asciz "Further,$allow$for$each$word$in$a$column$to$be$either$left$"
szLine6: .asciz "justified,$right$justified,$or$center$justified$within$its$column."
.align 8
qtbPtLine: .quad szLine1,szLine2,szLine3,szLine4,szLine5,szLine6
.equ NBLINES, (. - qtbPtLine) / 8
/*********************************/
/* UnInitialized data */
/*********************************/
.bss
/*********************************/
/* code section */
/*********************************/
.text
.global main
main: // entry of program
ldr x0,qAdrqtbPtLine
bl computeMaxiLengthWords
mov x19,x0 // column counter
ldr x0,qAdrszMessLeft
bl affichageMess
ldr x0,qAdrqtbPtLine
mov x1,x19 // column size
bl alignLeft
ldr x0,qAdrszMessRight
bl affichageMess
ldr x0,qAdrqtbPtLine
mov x1,x19 // column size
bl alignRight
ldr x0,qAdrszMessCenter
bl affichageMess
ldr x0,qAdrqtbPtLine
mov x1,x19 // column size
bl alignCenter
100: // standard end of the program
mov x0, #0 // return code
mov x8, #EXIT // request to exit program
svc #0 // perform the system call
qAdrszCarriageReturn: .quad szCarriageReturn
qAdrszMessLeft: .quad szMessLeft
qAdrszMessRight: .quad szMessRight
qAdrszMessCenter: .quad szMessCenter
qAdrqtbPtLine: .quad qtbPtLine
/******************************************************************/
/* compute maxi words */
/******************************************************************/
/* x0 contains adresse pointer array */
computeMaxiLengthWords:
stp fp,lr,[sp,-16]! // save registres
mov x2,#0 // indice pointer array
mov x3,#0 // maxi length words
1:
ldr x1,[x0,x2,lsl #3] // load pointer
mov x4,#0 // length words counter
mov x5,#0 // indice line character
2:
ldrb w6,[x1,x5] // load a line character
cmp x6,#0 // line end ?
beq 4f
cmp x6,#'$' // separator ?
bne 3f
cmp x4,x3
csel x3,x4,x3,gt // if greather replace maxi
mov x4,#-1 // raz length counter
3:
add x4,x4,#1
add x5,x5,#1 // increment character indice
b 2b // and loop
4: // end line
cmp x4,x3 // compare word counter and maxi
csel x3,x4,x3,gt // if greather replace maxi
add x2,x2,#1 // increment indice line pointer
cmp x2,#NBLINES // maxi ?
blt 1b // no -> loop
mov x0,x3 // return maxi length counter
100:
ldp fp,lr,[sp],16 // restaur des 2 registres
ret
/******************************************************************/
/* align left */
/******************************************************************/
/* x0 contains the address of pointer array*/
/* x1 contains column size */
alignLeft:
stp fp,lr,[sp,-16]! // save registres
sub sp,sp,#BUFFERSIZE // reserve place for output buffer
mov fp,sp
mov x5,x0 // array address
mov x2,#0 // indice array
1:
ldr x3,[x5,x2,lsl #3] // load line pointer
mov x4,#0 // line character indice
mov x7,#0 // output buffer character indice
mov x6,#0 // word lenght
2:
ldrb w0,[x3,x4] // load a character line
strb w0,[fp,x7] // store in buffer
cmp w0,#0 // line end ?
beq 6f
cmp w0,#'$' // separator ?
bne 5f
mov x0,#' '
strb w0,[fp,x7] // replace $ by space
3:
cmp x6,x1 // length word >= length column
bge 4f
add x7,x7,#1
mov x0,#' '
strb w0,[fp,x7] // add space to buffer
add x6,x6,#1
b 3b // and loop
4:
mov x6,#-1 // raz word length
5:
add x4,x4,#1 // increment line indice
add x7,x7,#1 // increment buffer indice
add x6,x6,#1 // increment word length
b 2b
6:
mov x0,#'\n'
strb w0,[fp,x7] // return line
add x7,x7,#1
mov x0,#0
strb w0,[fp,x7] // final zéro
mov x0,fp
bl affichageMess // display output buffer
add x2,x2,#1
cmp x2,#NBLINES
blt 1b
100:
add sp,sp,#BUFFERSIZE
ldp fp,lr,[sp],16 // restaur des 2 registres
ret
/******************************************************************/
/* align right */
/******************************************************************/
/* x0 contains the address of pointer array*/
/* x1 contains column size */
alignRight:
stp fp,lr,[sp,-16]! // save registres
sub sp,sp,#BUFFERSIZE // reserve place for output buffer
mov fp,sp
mov x5,x0 // array address
mov x2,#0 // indice array
1:
ldr x3,[x5,x2,lsl #3] // load line pointer
mov x4,#0 // line character indice
mov x7,#0 // output buffer character indice
mov x6,#0 // word lenght
mov x8,x3 // word begin address
2: // compute word length
ldrb w0,[x3,x4] // load a character line
cmp w0,#0 // line end ?
beq 3f
cmp w0,#'$' // separator ?
beq 3f
add x4,x4,#1 // increment line indice
add x6,x6,#1 // increment word length
b 2b
3:
cmp x6,#0
beq 4f
sub x6,x1,x6 // compute left spaces to add
4: // loop add spaces to buffer
cmp x6,#0
blt 5f
mov x0,#' '
strb w0,[fp,x7] // add space to buffer
add x7,x7,#1
sub x6,x6,#1
b 4b // and loop
5:
mov x9,#0
6: // copy loop word to buffer
ldrb w0,[x8,x9]
cmp x0,#'$'
beq 7f
cmp x0,#0 // line end
beq 8f
strb w0,[fp,x7]
add x7,x7,#1
add x9,x9,#1
b 6b
7:
add x8,x8,x9
add x8,x8,#1 // new word begin
mov x6,#0 // raz word length
add x4,x4,#1 // increment line indice
b 2b
8:
mov x0,#'\n'
strb w0,[fp,x7] // return line
add x7,x7,#1
mov x0,#0
strb w0,[fp,x7] // final zéro
mov x0,fp
bl affichageMess // display output buffer
add x2,x2,#1
cmp x2,#NBLINES
blt 1b
100:
add sp,sp,#BUFFERSIZE
ldp fp,lr,[sp],16 // restaur des 2 registres
ret
/******************************************************************/
/* align center */
/******************************************************************/
/* x0 contains the address of pointer array*/
/* x1 contains column size */
alignCenter:
stp fp,lr,[sp,-16]! // save registres
sub sp,sp,#BUFFERSIZE // reserve place for output buffer
mov fp,sp
mov x5,x0 // array address
mov x2,#0 // indice array
1:
ldr x3,[x5,x2,lsl #3] // load line pointer
mov x4,#0 // line character indice
mov x7,#0 // output buffer character indice
mov x6,#0 // word length
mov x8,x3 // word begin address
2: // compute word length
ldrb w0,[x3,x4] // load a character line
cmp w0,#0 // line end ?
beq 3f
cmp w0,#'$' // separator ?
beq 3f
add x4,x4,#1 // increment line indice
add x6,x6,#1 // increment word length
b 2b
3:
cmp x6,#0
beq 5f
sub x6,x1,x6 // total spaces number to add
mov x12,x6
lsr x6,x6,#1 // divise by 2 = left spaces number
4:
cmp x6,#0
blt 5f
mov x0,#' '
strb w0,[fp,x7] // add space to buffer
add x7,x7,#1 // increment output indice
sub x6,x6,#1 // decrement number space
b 4b // and loop
5:
mov x9,#0
6: // copy loop word to buffer
ldrb w0,[x8,x9]
cmp x0,#'$' // séparator ?
beq 7f
cmp x0,#0 // line end ?
beq 10f
strb w0,[fp,x7]
add x7,x7,#1
add x9,x9,#1
b 6b
7:
lsr x6,x12,#1 // divise total spaces by 2
sub x6,x12,x6 // and compute number spaces to right side
8: // loop to add right spaces
cmp x6,#0
ble 9f
mov x0,#' '
strb w0,[fp,x7] // add space to buffer
add x7,x7,#1
sub x6,x6,#1
b 8b // and loop
9:
add x8,x8,x9
add x8,x8,#1 // new address word begin
mov x6,#0 // raz word length
add x4,x4,#1 // increment line indice
b 2b // and loop new word
10:
mov x0,#'\n'
strb w0,[fp,x7] // return line
add x7,x7,#1
mov x0,#0
strb w0,[fp,x7] // final zéro
mov x0,fp
bl affichageMess // display output buffer
add x2,x2,#1 // increment line indice
cmp x2,#NBLINES // maxi ?
blt 1b // loop
100:
add sp,sp,#BUFFERSIZE
ldp fp,lr,[sp],16 // restaur des 2 registres
ret
/********************************************************/
/* File Include fonctions */
/********************************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeARM64.inc"
LEFT : Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. RIGHT : Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. CENTER : Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
ABAP
report z_align no standard page header.
start-of-selection.
data: lt_strings type standard table of string,
lv_strings type string.
append: 'Given$a$text$file$of$many$lines,$where$fields$within$a$line$' to lt_strings,
'are$delineated$by$a$single$''dollar''$character,$write$a$program' to lt_strings,
'that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$' to lt_strings,
'column$are$separated$by$at$least$one$space.' to lt_strings,
'Further,$allow$for$each$word$in$a$column$to$be$either$left$' to lt_strings,
'justified,$right$justified,$or$center$justified$within$its$column.' to lt_strings.
types ty_strings type standard table of string.
perform align_col using 'LEFT' lt_strings.
skip.
perform align_col using 'RIGHT' lt_strings.
skip.
perform align_col using 'CENTER' lt_strings.
form align_col using iv_just type string iv_strings type ty_strings.
constants: c_del value '$'.
data: lv_string type string,
lt_strings type table of string,
lt_tables like table of lt_strings,
lv_first type string,
lv_second type string,
lv_longest type i value 0,
lv_off type i value 0,
lv_len type i.
" Loop through the supplied text. It is expected at the input is a table of strings, with each
" entry in the table representing a new line of the input.
loop at iv_strings into lv_string.
" Split the current line at the delimiter.
split lv_string at c_del into lv_first lv_second.
" Loop through the line splitting at every delimiter.
do.
append lv_first to lt_strings.
lv_len = strlen( lv_first ).
" Check if the length of the new string is greater than the currently stored length.
if lv_len > lv_longest.
lv_longest = lv_len.
endif.
if lv_second na c_del.
" Check if the string is longer than the recorded maximum.
lv_len = strlen( lv_second ).
if lv_len > lv_longest.
lv_longest = lv_len.
endif.
append lv_second to lt_strings.
exit.
endif.
split lv_second at c_del into lv_first lv_second.
enddo.
append lt_strings to lt_tables.
clear lt_strings.
endloop.
" Loop through each line of input.
loop at lt_tables into lt_strings.
" Loop through each word in the line (Separated by specified delimiter).
loop at lt_strings into lv_string.
lv_off = ( sy-tabix - 1 ) * ( lv_longest + 2 ).
case iv_just.
when 'LEFT'.
write : at (lv_longest) lv_string left-justified.
when 'RIGHT'.
write at (lv_longest) lv_string right-justified.
when 'CENTER'.
write at (lv_longest) lv_string centered.
endcase.
endloop.
skip.
sy-linno = sy-linno - 1.
endloop.
endform.
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Action!
Atari 8-bit computer is able to show only 40 characters per line. The user has to press left/right arrow keys to scroll the content of whole text.
DEFINE LINES_COUNT="10"
DEFINE COLUMNS_COUNT="20"
DEFINE WORDS_COUNT="100"
DEFINE BUFFER_SIZE="2000"
DEFINE LINE_WIDTH="40"
DEFINE PTR="CARD"
PTR ARRAY lines(LINES_COUNT)
BYTE ARRAY wordStart(WORDS_COUNT)
BYTE ARRAY wordLen(WORDS_COUNT)
BYTE ARRAY firstWordInLine(LINES_COUNT)
BYTE ARRAY wordsInLine(LINES_COUNT)
BYTE ARRAY colWidths(COLUMNS_COUNT)
BYTE ARRAY buffer(BUFFER_SIZE)
BYTE lineCount,colCount,wordCount
CHAR sep=['$]
PROC AddLine(CHAR ARRAY line)
lines(lineCount)=line
lineCount==+1
RETURN
PROC InitData()
lineCount=0
AddLine("Given$a$text$file$of$many$lines,$where$fields$within$a$line$")
AddLine("are$delineated$by$a$single$'dollar'$character,$write$a$program")
AddLine("that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$")
AddLine("column$are$separated$by$at$least$one$space.")
AddLine("Further,$allow$for$each$word$in$a$column$to$be$either$left$")
AddLine("justified,$right$justified,$or$center$justified$within$its$column.")
RETURN
PROC ProcessData()
BYTE i,pos,len,start,w,col
CHAR ARRAY line
colCount=0 wordCount=0
FOR i=0 TO lineCount-1
DO
line=lines(i)
len=line(0)
firstWordInLine(i)=wordCount
wordsInLine(i)=0
pos=1 col=0
WHILE pos<=len
DO
start=pos
WHILE pos<=len AND line(pos)#sep
DO pos==+1 OD
w=pos-start
wordStart(wordCount)=start
wordLen(wordCount)=w
wordCount==+1
wordsInLine(i)==+1
IF col=colCount THEN
colWidths(col)=w
colCount==+1
ELSEIF w>colWidths(col) THEN
colWidths(col)=w
FI
col==+1
pos==+1
OD
OD
RETURN
BYTE FUNC GetBufLineLength()
BYTE i,res
res=0
FOR i=0 TO colCount-1
DO
res==+colWidths(i)+1
OD
res==+1
RETURN (res)
BYTE FUNC AtasciiToInternal(CHAR c)
BYTE c2
c2=c&$7F
IF c2<32 THEN
RETURN (c+64)
ELSEIF c2<96 THEN
RETURN (c-32)
FI
RETURN (c)
PROC GenerateLine(BYTE index BYTE align BYTE POINTER p)
BYTE wordIndex,last,left,right,start,len,colW
INT i,j
CHAR ARRAY line
line=lines(index)
wordIndex=firstWordInLine(index)
last=wordIndex+wordsInLine(index)-1
FOR i=0 TO colCount-1
DO
colW=colWidths(i)
p^=124 p==+1
IF wordIndex<=last THEN
start=wordStart(wordIndex)
len=wordLen(wordIndex)
IF align=0 THEN
left=0
right=colW-len
ELSEIF align=1 THEN
left=(colW-len)/2
right=colW-left-len
ELSE
left=colW-len
right=0
FI
p==+left
for j=start TO start+len-1
DO
p^=AtasciiToInternal(line(j))
p==+1
OD
p==+right
ELSE
p==+colW
FI
wordIndex==+1
OD
p^=124
RETURN
PROC FillBuffer(BYTE lineWidth)
BYTE i,align
BYTE POINTER p
p=buffer
Zero(p,BUFFER_SIZE)
FOR align=0 TO 2
DO
FOR i=0 TO lineCount-1
DO
GenerateLine(i,align,p)
p==+lineWidth
OD
OD
RETURN
BYTE FUNC GetMaxOffset()
BYTE res
res=GetBufLineLength()-LINE_WIDTH
RETURN (res)
PROC Update(BYTE offset,lineWidth)
BYTE POINTER srcPtr,dstPtr
BYTE i
srcPtr=buffer+offset
dstPtr=PeekC(88)+3*LINE_WIDTH
FOR i=0 TO 3*lineCount-1
DO
MoveBlock(dstPtr,srcPtr,LINE_WIDTH)
srcPtr==+lineWidth
dstPtr==+LINE_WIDTH
IF i=lineCount-1 OR i=2*lineCount-1 THEN
dstPtr==+LINE_WIDTH
FI
OD
RETURN
PROC Main()
BYTE
lineWidth,offset,maxOffset,k,
CH=$02FC, ;Internal hardware value for last key pressed
CRSINH=$02F0 ;Controls visibility of cursor
CRSINH=1 ;hide cursor
InitData()
ProcessData()
lineWidth=GetBufLineLength()
FillBuffer(lineWidth)
Position(2,1)
Print("Press left/right arrow key to scroll")
maxOffset=lineWidth-LINE_WIDTH
offset=0
Update(offset,lineWidth)
DO
k=CH
IF k#$FF THEN
CH=$FF
FI
IF k=134 AND offset>0 THEN
offset==-1
Update(offset,lineWidth)
ELSEIF k=135 AND offset<maxOffset THEN
offset==+1
Update(offset,lineWidth)
ELSEIF k=28 THEN
EXIT
FI
OD
RETURN
- Output:
Screenshot from Atari 8-bit computer
Press left/right arrow key to scroll |Given |a |text |file |of |many |lines, |where |fields |within |a |line| |are |delineated|by |a |single|'dollar' |character,|write |a |program| | | |that |aligns |each |column|of |fields |by |ensuring|that |words |in |each| |column |are |separated |by |at |least |one |space. | | | | | |Further, |allow |for |each |word |in |a |column |to |be |either|left| |justified,|right |justified,|or |center|justified|within |its |column.| | | | | Given | a | text | file | of | many | lines, | where |fields |within | a |line| | are |delineated| by | a |single|'dollar' |character,| write | a |program| | | | that | aligns | each |column| of | fields | by |ensuring| that | words | in |each| | column | are |separated | by | at | least | one | space. | | | | | | Further, | allow | for | each | word | in | a | column | to | be |either|left| |justified,| right |justified,| or |center|justified| within | its |column.| | | | | Given| a| text| file| of| many| lines,| where| fields| within| a|line| | are|delineated| by| a|single| 'dollar'|character,| write| a|program| | | | that| aligns| each|column| of| fields| by|ensuring| that| words| in|each| | column| are| separated| by| at| least| one| space.| | | | | | Further,| allow| for| each| word| in| a| column| to| be|either|left| |justified,| right|justified,| or|center|justified| within| its|column.| | | |
Ada
with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
with Ada.Text_IO; use Ada.Text_IO;
with Strings_Edit; use Strings_Edit;
procedure Column_Aligner is
Text : constant String :=
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$" & NUL &
"are$delineated$by$a$single$'dollar'$character,$write$a$program" & NUL &
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$" & NUL &
"column$are$separated$by$at$least$one$space." & NUL &
"Further,$allow$for$each$word$in$a$column$to$be$either$left$" & NUL &
"justified,$right$justified,$or$center$justified$within$its$column." & NUL;
File : File_Type;
Width : array (1..1_000) of Natural := (others => 0);
Line : String (1..200);
Column : Positive := 1;
Start : Positive := 1;
Pointer : Positive;
begin
Create (File, Out_File, "columned.txt");
-- Determining the widths of columns
for I in Text'Range loop
case Text (I) is
when '$' | NUL =>
Width (Column) := Natural'Max (Width (Column), I - Start + 1);
Start := I + 1;
if Text (I) = NUL then
Column := 1;
else
Column := Column + 1;
end if;
when others =>
null;
end case;
end loop;
-- Formatting
for Align in Alignment loop
Column := 1;
Start := 1;
Pointer := 1;
for I in Text'Range loop
case Text (I) is
when '$' | NUL =>
Put -- Formatted output of a word
( Destination => Line,
Pointer => Pointer,
Value => Text (Start..I - 1),
Field => Width (Column),
Justify => Align
);
Start := I + 1;
if Text (I) = NUL then
Put_Line (File, Line (1..Pointer - 1));
Pointer := 1;
Column := 1;
else
Column := Column + 1;
end if;
when others =>
null;
end case;
end loop;
end loop;
Close (File);
end Column_Aligner;
Formatted file sample:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Aime
data b;
file f;
text n, t;
list c, r, s;
integer a, i, k, m, w;
b = "Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n"
"are$delineated$by$a$single$'dollar'$character,$write$a$program\n"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n"
"column$are$separated$by$at$least$one$space.\n"
"Further,$allow$for$each$word$in$a$column$to$be$either$left$\n"
"justified,$right$justified,$or$center$justified$within$its$column.";
f.b_affix(b);
m = 0;
while (f.news(r, 0, 0, "$") ^ -1) {
c.append(r);
m = max(m, ~r);
}
i = 0;
while (i < m) {
w = 0;
for (, r in c) {
if (i < ~r) {
w = max(w, length(r[i]));
}
}
s.append(w + 1);
i += 1;
}
for (k, t in list("left", "center", "right")) {
o_(t, " justified\n");
for (, r in c) {
for (i, n in r) {
m = s[i] - ~n;
o_form("/w~3/~/w~1/", a = (2 - k) * m >> 1, "", m - a, "", n);
}
o_newline();
}
o_newline();
}
- Output:
left justified Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. center justified Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. right justified Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
ALGOL 68
STRING nl = REPR 10;
STRING text in list := "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"+nl+
"are$delineated$by$a$single$'dollar'$character,$write$a$program"+nl+
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"+nl+
"column$are$separated$by$at$least$one$space."+nl+
"Further,$allow$for$each$word$in$a$column$to$be$either$left$"+nl+
"justified,$right$justified,$or$center$justified$within$its$column.";
MODE PAGE = FLEX[0,0]STRING;
PAGE page;
PROC flex page = (PAGE in page, INT row, col)PAGE:(
HEAP FLEX[row, col]STRING out page;
out page[:1 UPB in page, :2 UPB in page] := in page;
FOR r TO row DO
FOR c FROM 2 UPB in page + 1 TO col DO out page[r,c]:="" OD
OD;
FOR r FROM 1 UPB in page + 1 TO row DO
FOR c FROM 1 TO col DO out page[r,c]:="" OD
OD;
out page
);
FILE text in file;
associate(text in file, text in list);
make term(text in file, "$");
on physical file end(text in file, (REF FILE skip)BOOL: stop iteration);
on logical file end(text in file, (REF FILE skip)BOOL: stop iteration);
FOR row DO
on line end(text in file, (REF FILE skip)BOOL: stop iteration);
FOR col DO
STRING tok;
getf(text in file, ($gx$,tok));
IF row > 1 UPB page THEN page := flex page(page, row, 2 UPB page) FI;
IF col > 2 UPB page THEN page := flex page(page, 1 UPB page, col) FI;
page[row,col]:=tok
OD;
stop iteration:
SKIP
OD;
stop iteration:
SKIP;
BEGIN
PROC aligner = (PAGE in page, PROC (STRING,INT)STRING aligner)VOID:(
PAGE page := in page;
[2 UPB page]INT max width;
FOR col TO 2 UPB page DO
INT max len:=0; FOR row TO UPB page DO IF UPB page[row,col]>max len THEN max len:=UPB page[row,col] FI OD;
FOR row TO UPB page DO page[row,col] := aligner(page[row,col], maxlen) OD
OD;
printf(($n(UPB page)(n(2 UPB page -1)(gx)gl)$,page))
);
PROC left = (STRING in, INT len)STRING: in + " "*(len - UPB in),
right = (STRING in, INT len)STRING: " "*(len - UPB in) + in,
centre = (STRING in, INT len)STRING: ( INT pad=len-UPB in; pad%2*" "+ in + (pad-pad%2)*" " );
[]STRUCT(STRING name, PROC(STRING,INT)STRING align) aligners = (("Left",left), ("Left",right), ("Centre",centre));
FOR index TO UPB aligners DO
print((new line, "# ",name OF aligners[index]," Column-aligned output:",new line));
aligner(page, align OF aligners[index])
OD
END
Amazing Hopper
#define IGet(__N__,__X__) [__N__]SGet(__X__)
#include <hbasic.h>
#define MAX_LINE 1000
Begin
Option Stack 15
Declare as Numeric ( fd, i, index, max token )
as Numeric ( num tokens, size Column, tCells )
as Alpha ( line )
as Numeric ( display Left, display Right, display Center )
GetParam(script, file to edit, separator)
// get statistics of file: #lines, #total chars, line more long, and num tokens from first line.
Token Sep( separator )
Stat( file to edit, dats )
// declare arrays to work:
Dim ( IGet(1,dats), Add(IGet(4,dats),10) ) for Fill Array("",cells)
Clear(dats)
MStore ( cells, display Left, display Right, display Center )
// read each line as array, get # of elements, and put into array cells:
Open(OPEN_READ, file to edit ) (fd)
When( File Error ){ Stop }
index=1
While Not Eof(fd)
ReadRow(MAX_LINE)(fd) and Copy to (line); get Length, and Move to (num tokens)
Set Interval [index, 1:num tokens]; Take( line ) and SPut(cells)
When ( var( max token) Is Lt (num tokens) ) { max token = num tokens }
++index
Wend
Close(fd)
// formatting...
For Up( i:=1, max token, 1 )
Set Interval [1:end,i], and Let ( size Column := MaxValue( Len(Get(cells)) ) Plus(1) )
Let ( tCells := Get(cells) )
LPad$( " ", size Column, tCells ), and Put(display Left)
RPad$( " ", size Column, tCells ), and Put(display Right)
CPad$( " ", size Column, tCells ), and Put(display Center)
Next
// display:
Token Sep ("")
Print("Left Pad:\n", display Left, Newl, "Right Pad:\n", display Right, Newl, "Center Pad:\n", display Center,Newl)
End
- Output:
Sample String was saved into "sample.txt" file.
$ hopper src/acolumns.bas sample.txt "$" Left Pad: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Right Pad: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Center Pad: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. $
APL
align←{
left ← {⍺↑⍵}
right ← {(-⍺)↑⍵}
center ← {⍺↑(-⌊(≢⍵)+(⍺-≢⍵)÷2)↑⍵}
text ← ⊃⎕NGET⍵
words ← ((≠∘'$')⊆⊣)¨(~text∊⎕TC)⊆text
sizes ← 1+⌈⌿↑≢¨¨words
method ← ⍎⍺
↑,/↑(⊂sizes)method¨¨↓↑words
}
- Output:
'left' align 'test.txt' Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. 'center' align 'test.txt' Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. 'right' align 'test.txt' Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
AppleScript
Probably not the first language in which you would really choose to do this kind of thing, but certainly possible, and can be readily easily assembled from a set of generic primitives.
-- COLUMN ALIGNMENTS ---------------------------------------------------------
property pstrLines : ¬
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n" & ¬
"are$delineated$by$a$single$'dollar'$character,$write$a$program\n" & ¬
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n" & ¬
"column$are$separated$by$at$least$one$space.\n" & ¬
"Further,$allow$for$each$word$in$a$column$to$be$either$left$\n" & ¬
"justified,$right$justified,$or$center$justified$within$its$column."
property eLeft : -1
property eCenter : 0
property eRight : 1
-- columnsAligned :: EnumValue -> [[String]] -> String
on columnsAligned(eAlign, lstCols)
-- padwords :: Int -> [String] -> [[String]]
script padwords
on |λ|(n, lstWords)
-- pad :: String -> String
script pad
on |λ|(str)
set lngPad to n - (length of str)
if eAlign = my eCenter then
set lngHalf to lngPad div 2
{replicate(lngHalf, space), str, ¬
replicate(lngPad - lngHalf, space)}
else
if eAlign = my eLeft then
{"", str, replicate(lngPad, space)}
else
{replicate(lngPad, space), str, ""}
end if
end if
end |λ|
end script
map(pad, lstWords)
end |λ|
end script
unlines(map(my unwords, ¬
transpose(zipWith(padwords, ¬
map(my widest, lstCols), lstCols))))
end columnsAligned
-- lineColumns :: String -> String -> String
on lineColumns(strColDelim, strText)
-- _words :: Text -> [Text]
script _words
on |λ|(str)
splitOn(strColDelim, str)
end |λ|
end script
set lstRows to map(_words, splitOn(linefeed, pstrLines))
set nCols to widest(lstRows)
-- fullRow :: [[a]] -> [[a]]
script fullRow
on |λ|(lst)
lst & replicate(nCols - (length of lst), {""})
end |λ|
end script
transpose(map(fullRow, lstRows))
end lineColumns
-- widest [a] -> Int
on widest(xs)
|length|(maximumBy(comparing(my |length|), xs))
end widest
-- TEST ----------------------------------------------------------------------
on run
set lstCols to lineColumns("$", pstrLines)
script testAlignment
on |λ|(eAlign)
columnsAligned(eAlign, lstCols)
end |λ|
end script
intercalate(return & return, ¬
map(testAlignment, {eLeft, eRight, eCenter}))
end run
-- GENERIC FUNCTIONS ---------------------------------------------------------
-- comparing :: (a -> b) -> (a -> a -> Ordering)
on comparing(f)
set mf to mReturn(f)
script
on |λ|(a, b)
set x to mf's |λ|(a)
set y to mf's |λ|(b)
if x < y then
-1
else
if x > y then
1
else
0
end if
end if
end |λ|
end script
end comparing
-- foldl :: (a -> b -> a) -> a -> [b] -> a
on foldl(f, startValue, xs)
tell mReturn(f)
set v to startValue
set lng to length of xs
repeat with i from 1 to lng
set v to |λ|(v, item i of xs, i, xs)
end repeat
return v
end tell
end foldl
-- Text -> [Text] -> Text
on intercalate(strText, lstText)
set {dlm, my text item delimiters} to {my text item delimiters, strText}
set strJoined to lstText as text
set my text item delimiters to dlm
return strJoined
end intercalate
-- length :: [a] -> Int
on |length|(xs)
length of xs
end |length|
-- Lift 2nd class handler function into 1st class script wrapper
-- mReturn :: Handler -> Script
on mReturn(f)
if class of f is script then
f
else
script
property |λ| : f
end script
end if
end mReturn
-- map :: (a -> b) -> [a] -> [b]
on map(f, xs)
tell mReturn(f)
set lng to length of xs
set lst to {}
repeat with i from 1 to lng
set end of lst to |λ|(item i of xs, i, xs)
end repeat
return lst
end tell
end map
-- maximumBy :: (a -> a -> Ordering) -> [a] -> a
on maximumBy(f, xs)
set cmp to mReturn(f)
script max
on |λ|(a, b)
if a is missing value or cmp's |λ|(a, b) < 0 then
b
else
a
end if
end |λ|
end script
foldl(max, missing value, xs)
end maximumBy
-- min :: Ord a => a -> a -> a
on min(x, y)
if y < x then
y
else
x
end if
end min
-- Egyptian multiplication - progressively doubling a list, appending
-- stages of doubling to an accumulator where needed for binary
-- assembly of a target length
-- replicate :: Int -> a -> [a]
on replicate(n, a)
if class of a is string then
set out to ""
else
set out to {}
end if
if n < 1 then return out
set dbl to a
repeat while (n > 1)
if (n mod 2) > 0 then set out to out & dbl
set n to (n div 2)
set dbl to (dbl & dbl)
end repeat
return out & dbl
end replicate
-- Text -> Text -> [Text]
on splitOn(strDelim, strMain)
set {dlm, my text item delimiters} to {my text item delimiters, strDelim}
set lstParts to text items of strMain
set my text item delimiters to dlm
return lstParts
end splitOn
-- transpose :: [[a]] -> [[a]]
on transpose(xss)
script column
on |λ|(_, iCol)
script row
on |λ|(xs)
item iCol of xs
end |λ|
end script
map(row, xss)
end |λ|
end script
map(column, item 1 of xss)
end transpose
-- [Text] -> Text
on unlines(lstLines)
intercalate(linefeed, lstLines)
end unlines
-- [Text] -> Text
on unwords(lstWords)
intercalate(" ", lstWords)
end unwords
-- zipWith :: (a -> b -> c) -> [a] -> [b] -> [c]
on zipWith(f, xs, ys)
set lng to min(length of xs, length of ys)
set lst to {}
tell mReturn(f)
repeat with i from 1 to lng
set end of lst to |λ|(item i of xs, item i of ys)
end repeat
return lst
end tell
end zipWith
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
ARM Assembly
/* ARM assembly Raspberry PI */
/* program alignColumn.s */
/* REMARK 1 : this program use routines in a include file
see task Include a file language arm assembly
for the routine affichageMess conversion10
see at end of this program the instruction include */
/* for constantes see task include a file in arm assembly */
/************************************/
/* Constantes */
/************************************/
.include "../constantes.inc"
.equ BUFFERSIZE, 20 * 10
/*********************************/
/* Initialized data */
/*********************************/
.data
szMessLeft: .asciz "LEFT :\n"
szMessRight: .asciz "\nRIGHT :\n"
szMessCenter: .asciz "\nCENTER :\n"
szCarriageReturn: .asciz "\n"
szLine1: .asciz "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
szLine2: .asciz "are$delineated$by$a$single$'dollar'$character,$write$a$program"
szLine3: .asciz "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
szLine4: .asciz "column$are$separated$by$at$least$one$space."
szLine5: .asciz "Further,$allow$for$each$word$in$a$column$to$be$either$left$"
szLine6: .asciz "justified,$right$justified,$or$center$justified$within$its$column."
itbPtLine: .int szLine1,szLine2,szLine3,szLine4,szLine5,szLine6
.equ NBLINES, (. - itbPtLine) / 4
/*********************************/
/* UnInitialized data */
/*********************************/
.bss
/*********************************/
/* code section */
/*********************************/
.text
.global main
main: @ entry of program
ldr r0,iAdritbPtLine
bl computeMaxiLengthWords
mov r10,r0 @ column counter
ldr r0,iAdrszMessLeft
bl affichageMess
ldr r0,iAdritbPtLine
mov r1,r10 @ column size
bl alignLeft
ldr r0,iAdrszMessRight
bl affichageMess
ldr r0,iAdritbPtLine
mov r1,r10 @ column size
bl alignRight
ldr r0,iAdrszMessCenter
bl affichageMess
ldr r0,iAdritbPtLine
mov r1,r10 @ column size
bl alignCenter
100: @ standard end of the program
mov r0, #0 @ return code
mov r7, #EXIT @ request to exit program
svc #0 @ perform the system call
iAdrszCarriageReturn: .int szCarriageReturn
iAdrszMessLeft: .int szMessLeft
iAdrszMessRight: .int szMessRight
iAdrszMessCenter: .int szMessCenter
iAdritbPtLine: .int itbPtLine
/******************************************************************/
/* compute maxi words */
/******************************************************************/
/* r0 contains adresse pointer array */
computeMaxiLengthWords:
push {r1-r6,lr} @ save registers
mov r2,#0 @ indice pointer array
mov r3,#0 @ maxi length words
1:
ldr r1,[r0,r2,lsl #2] @ load pointer
mov r4,#0 @ length words counter
mov r5,#0 @ indice line character
2:
ldrb r6,[r1,r5] @ load a line character
cmp r6,#0 @ line end ?
beq 4f
cmp r6,#'$' @ separator ?
bne 3f
cmp r4,r3
movgt r3,r4 @ ig greather replace maxi
mov r4,#-1 @ raz length counter
3:
add r4,r4,#1
add r5,r5,#1 @ increment character indice
b 2b @ and loop
4: @ end line
cmp r4,r3 @ compare word counter and maxi
movgt r3,r4 @ if greather replace maxi
add r2,r2,#1 @ increment indice line pointer
cmp r2,#NBLINES @ maxi ?
blt 1b @ no -> loop
mov r0,r3 @ return maxi length counter
100:
pop {r1-r6,pc}
/******************************************************************/
/* align left */
/******************************************************************/
/* r0 contains the address of pointer array*/
/* r1 contains column size */
alignLeft:
push {r4-r7,fp,lr} @ save registers
sub sp,sp,#BUFFERSIZE @ reserve place for output buffer
mov fp,sp
mov r5,r0 @ array address
mov r2,#0 @ indice array
1:
ldr r3,[r5,r2,lsl #2] @ load line pointer
mov r4,#0 @ line character indice
mov r7,#0 @ output buffer character indice
mov r6,#0 @ word lenght
2:
ldrb r0,[r3,r4] @ load a character line
strb r0,[fp,r7] @ store in buffer
cmp r0,#0 @ line end ?
beq 6f
cmp r0,#'$' @ separator ?
bne 5f
mov r0,#' '
strb r0,[fp,r7] @ replace $ by space
3:
cmp r6,r1 @ length word >= length column
bge 4f
add r7,r7,#1
mov r0,#' '
strb r0,[fp,r7] @ add space to buffer
add r6,r6,#1
b 3b @ and loop
4:
mov r6,#-1 @ raz word length
5:
add r4,r4,#1 @ increment line indice
add r7,r7,#1 @ increment buffer indice
add r6,r6,#1 @ increment word length
b 2b
6:
mov r0,#'\n'
strb r0,[fp,r7] @ return line
add r7,r7,#1
mov r0,#0
strb r0,[fp,r7] @ final zéro
mov r0,fp
bl affichageMess @ display output buffer
add r2,r2,#1
cmp r2,#NBLINES
blt 1b
100:
add sp,sp,#BUFFERSIZE
pop {r4-r7,fp,pc}
/******************************************************************/
/* align right */
/******************************************************************/
/* r0 contains the address of pointer array*/
/* r1 contains column size */
alignRight:
push {r4-r9,fp,lr} @ save registers
sub sp,sp,#BUFFERSIZE @ reserve place for output buffer
mov fp,sp
mov r5,r0 @ array address
mov r2,#0 @ indice array
1:
ldr r3,[r5,r2,lsl #2] @ load line pointer
mov r4,#0 @ line character indice
mov r7,#0 @ output buffer character indice
mov r6,#0 @ word lenght
mov r8,r3 @ word begin address
2: @ compute word length
ldrb r0,[r3,r4] @ load a character line
cmp r0,#0 @ line end ?
beq 3f
cmp r0,#'$' @ separator ?
beq 3f
add r4,r4,#1 @ increment line indice
add r6,r6,#1 @ increment word length
b 2b
3:
cmp r6,#0
beq 4f
sub r6,r1,r6 @ compute left spaces to add
4: @ loop add spaces to buffer
cmp r6,#0
blt 5f
mov r0,#' '
strb r0,[fp,r7] @ add space to buffer
add r7,r7,#1
sub r6,r6,#1
b 4b @ and loop
5:
mov r9,#0
6: @ copy loop word to buffer
ldrb r0,[r8,r9]
cmp r0,#'$'
beq 7f
cmp r0,#0 @ line end
beq 8f
strb r0,[fp,r7]
add r7,r7,#1
add r9,r9,#1
b 6b
7:
add r8,r8,r9
add r8,r8,#1 @ new word begin
mov r6,#0 @ raz word length
add r4,r4,#1 @ increment line indice
b 2b
8:
mov r0,#'\n'
strb r0,[fp,r7] @ return line
add r7,r7,#1
mov r0,#0
strb r0,[fp,r7] @ final zéro
mov r0,fp
bl affichageMess @ display output buffer
add r2,r2,#1
cmp r2,#NBLINES
blt 1b
100:
add sp,sp,#BUFFERSIZE
pop {r4-r9,fp,pc}
/******************************************************************/
/* align center */
/******************************************************************/
/* r0 contains the address of pointer array*/
/* r1 contains column size */
alignCenter:
push {r4-r12,lr} @ save registers
sub sp,sp,#BUFFERSIZE @ reserve place for output buffer
mov fp,sp
mov r5,r0 @ array address
mov r2,#0 @ indice array
1:
ldr r3,[r5,r2,lsl #2] @ load line pointer
mov r4,#0 @ line character indice
mov r7,#0 @ output buffer character indice
mov r6,#0 @ word length
mov r8,r3 @ word begin address
2: @ compute word length
ldrb r0,[r3,r4] @ load a character line
cmp r0,#0 @ line end ?
beq 3f
cmp r0,#'$' @ separator ?
beq 3f
add r4,r4,#1 @ increment line indice
add r6,r6,#1 @ increment word length
b 2b
3:
cmp r6,#0
beq 5f
sub r6,r1,r6 @ total spaces number to add
mov r12,r6
lsr r6,r6,#1 @ divise by 2 = left spaces number
4:
cmp r6,#0
blt 5f
mov r0,#' '
strb r0,[fp,r7] @ add space to buffer
add r7,r7,#1 @ increment output indice
sub r6,r6,#1 @ decrement number space
b 4b @ and loop
5:
mov r9,#0
6: @ copy loop word to buffer
ldrb r0,[r8,r9]
cmp r0,#'$' @ séparator ?
beq 7f
cmp r0,#0 @ line end ?
beq 10f
strb r0,[fp,r7]
add r7,r7,#1
add r9,r9,#1
b 6b
7:
lsr r6,r12,#1 @ divise total spaces by 2
sub r6,r12,r6 @ and compute number spaces to right side
8: @ loop to add right spaces
cmp r6,#0
ble 9f
mov r0,#' '
strb r0,[fp,r7] @ add space to buffer
add r7,r7,#1
sub r6,r6,#1
b 8b @ and loop
9:
add r8,r8,r9
add r8,r8,#1 @ new address word begin
mov r6,#0 @ raz word length
add r4,r4,#1 @ increment line indice
b 2b @ and loop new word
10:
mov r0,#'\n'
strb r0,[fp,r7] @ return line
add r7,r7,#1
mov r0,#0
strb r0,[fp,r7] @ final zéro
mov r0,fp
bl affichageMess @ display output buffer
add r2,r2,#1 @ increment line indice
cmp r2,#NBLINES @ maxi ?
blt 1b @ loop
100:
add sp,sp,#BUFFERSIZE
pop {r4-r12,pc}
/***************************************************/
/* ROUTINES INCLUDE */
/***************************************************/
.include "../affichage.inc"
LEFT : Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. RIGHT : Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. CENTER : Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Arturo
text: {
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
}
output: map split.lines text => [split.by:"$" &]
loop output 'line [
loop line 'word -> prints pad word 12
print ""
]
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
AutoHotkey
Alignment := "L" ; Options: L, R, C
Text =
( LTrim
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
)
Loop, Parse, Text ; calculate column's width
If A_LoopField in $,`n
If (N > W)
W := N, N := 0
Else
N := 0
Else
++N
Width := ++W
Loop, Parse, Text, `n ; process each line
{
Words := StrSplit(A_LoopField, "$")
For i, Word in Words ; process each word
Line .= Align(Word, Alignment, Width)
Result .= RTrim(Line) . "`n"
Line := ""
}
Clipboard := Result ; present results
MsgBox, The results are in the Clipboard
Align(Pal, How, Width) { ; function for alignment
Length := StrLen(Pal)
If (How = "L")
Return Pal . Spc(Width - Length)
Else If (How = "R")
Return Spc(Width - Length) . Pal
Else If (How = "C")
Return Spc((Width - Length)//2) . Pal . Spc(Width - Length - (Width - Length)//2)
}
Spc(Number) { ; function to concatenate space characters
Loop, %Number%
Ret .= A_Space
Return Ret
}
AutoIt
; == If the given text is in an file, it will read with:
#include <File.au3>
Global $aRead
_FileReadToArray($sPath, $aRead) ; == $aRead[0] includes count of lines, every line stored in one item (without linebreak)
; == For example we get the same result with StringSplit()
Global $sText = _
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$" & @CRLF & _
"are$delineated$by$a$single$'dollar'$character,$write$a$program" & @CRLF & _
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$" & @CRLF & _
"column$are$separated$by$at$least$one$space." & @CRLF & _
"Further,$allow$for$each$word$in$a$column$to$be$either$left$" & @CRLF & _
"justified,$right$justified,$or$center$justified$within$its$column." & @CRLF
$aRead = StringSplit($sText, @CRLF, 1)
; == strip leading and trailing "$" and trailing spaces, count remaining "$" to get max column number
Global $iMaxColumn = 0, $iLines = 0
For $i = 1 To $aRead[0]
If $aRead[$i] = '' Then ContinueLoop ; skip empty lines
$iLines += 1
$aRead[$i] = StringRegExpReplace(StringRegExpReplace(StringRegExpReplace($aRead[$i], '^\$', ''), '\$$', ''), '\s*$', '')
StringReplace($aRead[$i], '$', '$')
If @extended +1 > $iMaxColumn Then $iMaxColumn = @extended +1
Next
; == build array to store all fields and length of every item
Global $aFields[$iLines][$iMaxColumn +1][2]
; == and store the max. length of item in columns
Global $aColLen[$iMaxColumn]
; == fill the array
Global $aSplitLine
$iLines = 0
For $i = 1 To $aRead[0]
If $aRead[$i] = '' Then ContinueLoop ; skip empty lines
$iMaxColLen = 0
$aSplitLine = StringSplit($aRead[$i], '$')
For $j = 1 To $aSplitLine[0]
$aFields[$iLines][$j-1][0] = $aSplitLine[$j]
$aFields[$iLines][$j-1][1] = StringLen($aSplitLine[$j])
If $aFields[$iLines][$j-1][1] > $aColLen[$j-1] Then $aColLen[$j-1] = $aFields[$iLines][$j-1][1]
Next
$iLines += 1
Next
; == let the user select the alignment for every column
$sAlign = InputBox('Column alignment', 'There are ' & $iMaxColumn & ' columns.' & @LF & '0 = left 1 = center 2 = right' & @LF & _
'Input alignment for all columns without delimiters.' & @LF & 'Let it empty, to align all left.')
If $sAlign = '' Then
For $i = 1 To $iMaxColumn
$sAlign &= '0'
Next
EndIf
Global $aAlignment = StringSplit($sAlign, '', 2)
; == output all to console
Global $sLineOut
For $i = 0 To UBound($aFields) -1
$sLineOut = ''
For $j = 0 To $iMaxColumn -1
If $aFields[$i][$j][0] = '' Then ContinueLoop
$sLineOut &= _GetAligned($aFields[$i][$j][0], $aFields[$i][$j][1], $aAlignment[$j], $aColLen[$j])
Next
ConsoleWrite(StringTrimRight($sLineOut, 1) & @LF)
Next
Func _GetAligned($_sString, $_iLen, $_iAlign, $_iMaxLen)
Local $sSpace = ''
For $i = 1 To $_iMaxLen
$sSpace &= ' '
Next
Switch $_iAlign
Case 0
Return $_sString & StringLeft($sSpace, $_iMaxLen - $_iLen +1)
Case 1
Local $iLenLeft = Int(($_iMaxLen - $_iLen)/2)
Local $iLenRight = $_iMaxLen - $iLenLeft - $_iLen
Return StringLeft($sSpace, $iLenLeft) & $_sString & StringLeft($sSpace, $iLenRight) & ' '
Case 2
Return StringLeft($sSpace, $_iMaxLen - $_iLen) & $_sString & ' '
EndSwitch
EndFunc ;==>_GetAligned
Example output in Alignment: left - center - right - left - center - right - left - center - right - left - center - right
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
AWK
# syntax: GAWK -f ALIGN_COLUMNS.AWK ALIGN_COLUMNS.TXT
BEGIN {
colsep = " " # separator between columns
report("raw data")
}
{ printf("%s\n",$0)
arr[NR] = $0
n = split($0,tmp_arr,"$")
for (j=1; j<=n; j++) {
width = max(width,length(tmp_arr[j]))
}
}
END {
report("left justified")
report("right justified")
report("center justified")
exit(0)
}
function report(text, diff,i,j,l,n,r,tmp_arr) {
printf("\nreport: %s\n",text)
for (i=1; i<=NR; i++) {
n = split(arr[i],tmp_arr,"$")
if (tmp_arr[n] == "") { n-- }
for (j=1; j<=n; j++) {
if (text ~ /^[Ll]/) { # left
printf("%-*s%s",width,tmp_arr[j],colsep)
}
else if (text ~ /^[Rr]/) { # right
printf("%*s%s",width,tmp_arr[j],colsep)
}
else if (text ~ /^[Cc]/) { # center
diff = width - length(tmp_arr[j])
l = r = int(diff / 2)
if (diff != l + r) { r++ }
printf("%*s%s%*s%s",l,"",tmp_arr[j],r,"",colsep)
}
}
printf("\n")
}
}
function max(x,y) { return((x > y) ? x : y) }
Output:
report: raw data Given$a$text$file$of$many$lines,$where$fields$within$a$line$ are$delineated$by$a$single$'dollar'$character,$write$a$program that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$ column$are$separated$by$at$least$one$space. Further,$allow$for$each$word$in$a$column$to$be$either$left$ justified,$right$justified,$or$center$justified$within$its$column. report: left justified Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. report: right justified Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. report: center justified Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
BaCon
DECLARE in$[] = { "Given$a$text$file$of$many$lines,$where$fields$within$a$line$", \
"are$delineated$by$a$single$'dollar'$character,$write$a$program", \
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$", \
"column$are$separated$by$at$least$one$space.", \
"Further,$allow$for$each$word$in$a$column$to$be$either$left$", \
"justified,$right$justified,$or$center$justified$within$its$column." }
OPTION DELIM "$"
CONST items = 6
SUB Print_In_Columns(style)
' Find widest column
FOR y = 0 TO items-1
FOR x = 1 TO AMOUNT(in$[y])
IF LEN(TOKEN$(in$[y], x)) > max THEN max = LEN(TOKEN$(in$[y], x))
NEXT
NEXT
' Print aligned
FOR y = 0 TO items-1
FOR x = 1 TO AMOUNT(in$[y])
PRINT ALIGN$(TOKEN$(in$[y], x), max+1, style);
NEXT
PRINT
NEXT
PRINT
END SUB
Print_In_Columns(0)
Print_In_Columns(1)
Print_In_Columns(2)
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
BASIC
BBC BASIC
DATA 6
DATA "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
DATA "are$delineated$by$a$single$'dollar'$character,$write$a$program"
DATA "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
DATA "column$are$separated$by$at$least$one$space."
DATA "Further,$allow$for$each$word$in$a$column$to$be$either$left$"
DATA "justified,$right$justified,$or$center$justified$within$its$column."
REM First find the maximum length of a 'word':
max% = 0
READ nlines%
FOR Line% = 1 TO nlines%
READ text$
REPEAT
word$ = FNword(text$, "$")
IF LEN(word$) > max% THEN max% = LEN(word$)
UNTIL word$ = ""
NEXT Line%
@% = max% : REM set column width
REM Now display the aligned text:
RESTORE
READ nlines%
FOR Line% = 1 TO nlines%
READ text$
REPEAT
word$ = FNword(text$, "$")
PRINT FNjustify(word$, max%, "left"),;
UNTIL word$ = ""
PRINT
NEXT Line%
END
DEF FNword(text$, delim$)
PRIVATE delim%
LOCAL previous%
IF delim% = 0 THEN
previous% = 1
ELSE
previous% = delim% + LEN(delim$)
ENDIF
delim% = INSTR(text$+delim$, delim$, previous%)
IF delim% = 0 THEN
= ""
ELSE
= MID$(text$, previous%, delim%-previous%) + " "
ENDIF
DEF FNjustify(word$, field%, mode$)
IF word$ = "" THEN = ""
CASE mode$ OF
WHEN "center": = STRING$((field%-LEN(word$)) DIV 2, " ") + word$
WHEN "right": = STRING$(field%-LEN(word$), " ") + word$
ENDCASE
= word$
Commodore BASIC
10 rem ********************************
20 rem print words in columns
30 rem commodore basic 2.0
40 rem ********************************
50 print chr$(14) : rem change to upper/lower case set
60 gosub 140 : rem find length of longest word
70 algn$ = "left"
80 gosub 260 : rem print aligned text
90 algn$ = "center"
100 gosub 260
110 algn$ = "right"
120 gosub 260
130 end
140 rem *** find length of longest word
150 mx=0
160 for i=1 to 6
170 read a$
180 n=1
190 for j=1 to len(a$)
200 if mid$(a$,j,1)<>"$" then n=n+1: goto 230
210 if mx<n then mx=n
220 n=1
230 next
240 next
250 return
260 rem print aligned text
270 restore : rem reset data read pointer
280 s$ = " "
290 print : print algn$;"-aligned"
300 c=1 : rem column counter
310 for i=1 to 6
320 read a$
330 n=1
340 for j=1 to len(a$)
350 if mid$(a$,j,1)<>"$" then n=n+1 : goto 380
360 gosub 440 : rem print word
370 n=1
380 next
390 if n>1 then gosub 440
400 next
410 print
420 return
430 rem ********* print word **********
440 b$ = mid$(a$,j-n+1,n-1)
450 b = len(b$)
460 if algn$ = "center" then 520
470 if algn$ = "right" then 570
480 if c+b<40 and c+mx>40 then print b$: c=1: return
490 if c+mx>40 then print : c=1
500 print b$;left$(s$,mx-b);: c=c+mx
510 return
520 if c+mx>40 then print : c=1
530 bb=(mx-b)/2 : ba=bb
540 if bb>1 and int(bb)=bb then ba=bb-1
550 print left$(s$,ba);b$;left$(s$,bb);: c=c+mx
560 return
570 if c+mx>40 then print : c=1
580 print left$(s$,mx-b);b$;: c=c+mx
590 return
600 rem *********** the words *********
610 data "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
620 data "are$delineated$by$a$single$'dollar'$character,$write$a$program"
630 data "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
640 data "column$are$separated$by$at$least$one$space."
650 data "Further,$allow$for$each$word$in$a$column$to$be$either$left$"
660 data "justified,$right$justified,$or$center$justified$within$its$column"
Batch File
@echo off
setlocal enabledelayedexpansion
mode con cols=103
echo Given$a$text$file$of$many$lines,$where$fields$within$a$line$ >file.txt
echo are$delineated$by$a$single$'dollar'$character,$write$a$program! >>file.txt
echo that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$>>file.txt
echo column$are$separated$by$at$least$one$space.>>file.txt
echo Further,$allow$for$each$word$in$a$column$to$be$either$left$>>file.txt
echo justified,$right$justified,$or$center$justified$within$its$column.>>file.txt
for /f "tokens=1-13 delims=$" %%a in ('type file.txt') do (
call:maxlen %%a %%b %%c %%d %%e %%f %%g %%h %%i %%j %%k %%l %%m )
echo.
for /f "tokens=1-13 delims=$" %%a in ('type file.txt') do (
call:align 1 %%a %%b %%c %%d %%e %%f %%g %%h %%i %%j %%k %%l %%m )
echo.
for /f "tokens=1-13 delims=$" %%a in ('type file.txt') do (
call:align 2 %%a %%b %%c %%d %%e %%f %%g %%h %%i %%j %%k %%l %%m )
echo.
for /f "tokens=1-13 delims=$" %%a in ('type file.txt') do (
call:align 3 %%a %%b %%c %%d %%e %%f %%g %%h %%i %%j %%k %%l %%m )
exit /B
:maxlen &::sets variables len1 to len13
set "cnt=1"
:loop1
if "%1"=="" exit /b
call:strlen %1 length
if !len%cnt%! lss !length! set len%cnt%=!length!
set /a cnt+=1
shift
goto loop1
:align
setlocal
set cnt=1
set print=
:loop2
if "%2"=="" echo(%print%&endlocal & exit /b
set /a width=len%cnt%,cnt+=1
set arr=%2
if %1 equ 1 call:left %width% arr
if %1 equ 2 call:right %width% arr
if %1 equ 3 call:center %width% arr
set "print=%print%%arr% "
shift /2
goto loop2
:left %num% &string
setlocal
set "arr=!%2! "
set arr=!arr:~0,%1!
endlocal & set %2=%arr%
exit /b
:right %num% &string
setlocal
set "arr= !%2!"
set arr=!arr:~-%1!
endlocal & set %2=%arr%
exit /b
:center %num% &string
setlocal
set /a width=%1-1
set arr=!%2!
:loop3
if "!arr:~%width%,1!"=="" set "arr=%arr% "
if "!arr:~%width%,1!"=="" set "arr= %arr%"
if "!arr:~%width%,1!"=="" goto loop3
endlocal & set %2=%arr%
exit /b
:strlen StrVar &RtnVar
setlocal EnableDelayedExpansion
set "s=#%~1"
set "len=0"
for %%N in (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) do (
if "!s:~%%N,1!" neq "" set /a "len+=%%N" & set "s=!s:~%%N!"
)
endlocal & set %~2=%len%
exit /b
- Output:
Given a text file of many lines where fields within a line are delineated by a single 'dollar' character write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further allow for each word in a column to be either left justified right justified or center justified within its column. Given a text file of many lines where fields within a line are delineated by a single 'dollar' character write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further allow for each word in a column to be either left justified right justified or center justified within its column. Given a text file of many lines where fields within a line are delineated by a single 'dollar' character write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further allow for each word in a column to be either left justified right justified or center justified within its column.
Beads
beads 1 program 'Align columns'
const
text = '''Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.'''
var
words : array^2 of str
widths : array of num
calc div_line
var s = '+'
loop across:widths val:w
s = s & str_repeat('-',w) & '+'
log s
calc show_table(
justify
)
loop across:words index:i
var s = '|'
loop across:widths index:j val:w
var
word = words[i,j]
if word == U
word = ''
case justify
| RIGHT
s = s & pad_left(word,w)
| LEFT
s = s & pad_right(word,w)
| CENTER
w = w - str_len(word)
s = s & str_repeat(' ',idiv(w,2)) & word & str_repeat(' ',idiv(w,2)+mod(w,2))
s = s & '|'
log s
div_line
calc main_init
var w
split_lines_words (text, words, delim:'$')
loop across:words index:i
loop across:words[i] index:j
w = str_len(words[i,j])
widths[j] = max(w,widths[j])
loop across:[LEFT CENTER RIGHT] val:v
log "\n{v} justified\n"
div_line
show_table(v)
- Output:
LEFT justified +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |Given |a |text |file |of |many |lines, |where |fields |within |a |line| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |are |delineated|by |a |single|'dollar' |character,|write |a |program| | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |that |aligns |each |column|of |fields |by |ensuring|that |words |in |each| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |column |are |separated |by |at |least |one |space. | | | | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |Further, |allow |for |each |word |in |a |column |to |be |either|left| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |justified,|right |justified,|or |center|justified|within |its |column.| | | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ CENTER justified +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | Given | a | text | file | of | many | lines, | where |fields |within | a |line| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | are |delineated| by | a |single|'dollar' |character,| write | a |program| | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | that | aligns | each |column| of | fields | by |ensuring| that | words | in |each| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | column | are |separated | by | at | least | one | space. | | | | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | Further, | allow | for | each | word | in | a | column | to | be |either|left| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |justified,| right |justified,| or |center|justified| within | its |column.| | | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ RIGHT justified +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | Given| a| text| file| of| many| lines,| where| fields| within| a|line| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | are|delineated| by| a|single| 'dollar'|character,| write| a|program| | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | that| aligns| each|column| of| fields| by|ensuring| that| words| in|each| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | column| are| separated| by| at| least| one| space.| | | | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ | Further,| allow| for| each| word| in| a| column| to| be|either|left| +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+ |justified,| right|justified,| or|center|justified| within| its|column.| | | | +----------+----------+----------+------+------+---------+----------+--------+-------+-------+------+----+
BQN
A function which returns a rectangular 2D array which represents the lines.
Split ← (⊢-˜+`׬)∘=⊔⊢
PadRow ← {
w‿t𝕊𝕩: # t → type.
# 0 → left
# 1 → right
# 2 → center
pstyle←t⊑⟨{0‿𝕩},{𝕩‿0},{⟨⌊𝕩÷2,⌈𝕩÷2⟩}⟩
𝕩{(⊣∾𝕨∾⊢)´(Pstyle 𝕩)/¨<w}¨(⌈´-⊢)≠¨𝕩
}
Align ← {{𝕨∾' '∾𝕩}´˘⍉" "‿𝕨⊸PadRow˘⍉>⟨""⟩‿0 PadRow '$' Split¨(@+10) Split 𝕩}
1 Align text
┌─
╵" Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column. "
┘
C
See Column Aligner/C
C#
Old version
Uses a delegate, which were added to the language in C# 2, to define left-, right-, or center-justified.
using System;
class ColumnAlignerProgram
{
delegate string Justification(string s, int width);
static string[] AlignColumns(string[] lines, Justification justification)
{
const char Separator = '$';
// build input table and calculate columns count
string[][] table = new string[lines.Length][];
int columns = 0;
for (int i = 0; i < lines.Length; i++)
{
string[] row = lines[i].TrimEnd(Separator).Split(Separator);
if (columns < row.Length) columns = row.Length;
table[i] = row;
}
// create formatted table
string[][] formattedTable = new string[table.Length][];
for (int i = 0; i < formattedTable.Length; i++)
{
formattedTable[i] = new string[columns];
}
for (int j = 0; j < columns; j++)
{
// get max column width
int columnWidth = 0;
for (int i = 0; i < table.Length; i++)
{
if (j < table[i].Length && columnWidth < table[i][j].Length)
columnWidth = table[i][j].Length;
}
// justify column cells
for (int i = 0; i < formattedTable.Length; i++)
{
if (j < table[i].Length)
formattedTable[i][j] = justification(table[i][j], columnWidth);
else
formattedTable[i][j] = new String(' ', columnWidth);
}
}
// create result
string[] result = new string[formattedTable.Length];
for (int i = 0; i < result.Length; i++)
{
result[i] = String.Join(" ", formattedTable[i]);
}
return result;
}
static string JustifyLeft(string s, int width) { return s.PadRight(width); }
static string JustifyRight(string s, int width) { return s.PadLeft(width); }
static string JustifyCenter(string s, int width)
{
return s.PadLeft((width + s.Length) / 2).PadRight(width);
}
static void Main()
{
string[] input = {
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column.",
};
foreach (string line in AlignColumns(input, JustifyCenter))
{
Console.WriteLine(line);
}
}
}
Newer version
Uses features of newer versions, like LINQ, lambdas and switch expressions.
using System;
using System.Linq;
enum Justification { Left, Center, Right }
public class Program
{
static void Main()
{
string text =
@"Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.";
AlignColumns(text, Justification.Left);
Console.WriteLine();
AlignColumns(text, Justification.Center);
Console.WriteLine();
AlignColumns(text, Justification.Right);
}
public static void AlignColumns(string text, Justification justification) =>
AlignColumns(text.Split(Environment.NewLine), justification);
public static void AlignColumns(string[] lines, Justification justification) =>
AlignColumns(lines.Select(line => line.Split('$')).ToArray(), justification);
public static void AlignColumns(string[][] table, Justification justification)
{
Console.WriteLine(justification + ":");
int columns = table.Max(line => line.Length);
var columnWidths =
Enumerable.Range(0, columns)
.Select(i => table.Max(line => i < line.Length ? line[i].Length : 0)
).ToArray();
foreach (var line in table) {
Console.WriteLine(string.Join(" ",
Enumerable.Range(0, line.Length)
.Select(i => justification switch {
Justification.Left => line[i].PadRight(columnWidths[i]),
Justification.Right => line[i].PadLeft(columnWidths[i]),
_ => line[i].PadLeft(columnWidths[i] / 2).PadRight(columnWidths[i])
})
));
}
}
}
- Output:
Left: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Center: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Right: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
C++
Clojure
(ns rosettacode.align-columns
(:require [clojure.contrib.string :as str]))
(def data "Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.")
(def table (map #(str/split #"\$" %) (str/split-lines data)))
(defn col-width [n table] (reduce max (map #(try (count (nth % n))
(catch Exception _ 0))
table)))
(defn spaces [n] (str/repeat n " "))
(defn add-padding
"if the string is too big turncate it, else return a string with padding"
[string width justification]
(if (>= (count string) width) (str/take width string)
(let [pad-len (int (- width (count string))) ;we don't want rationals
half-pad-len (int (/ pad-len 2))]
(case justification
:right (str (spaces pad-len) string)
:left (str string (spaces pad-len))
:center (str (spaces half-pad-len) string (spaces (- pad-len half-pad-len)))))))
(defn aligned-table
"get the width of each column, then generate a new table with propper padding for eath item"
([table justification]
(let [col-widths (map #(+ 2 (col-width % table)) (range (count(first table))))]
(map
(fn [row] (map #(add-padding %1 %2 justification) row col-widths))
table))))
(defn print-table
[table]
(do (println)
(print (str/join "" (flatten (interleave table (repeat "\n")))))))
(print-table (aligned-table table :center))
COBOL
identification division.
program-id. AlignColumns.
data division.
working-storage section.
*>-> Constants
78 MAX-LINES value 6.
78 MAX-LINE-SIZE value 66.
78 MAX-COLUMNS value 12.
78 MAX-COLUMN-SIZE value 16.
*>-> Indexes
01 w-idx pic is 9(2).
01 w-idy pic is 9(2).
01 w-pos pic is 9(3).
*>-> Data structures
01 w-lines.
05 w-line pic is x(MAX-LINE-SIZE) occurs MAX-LINES.
01 w-column-sizes.
05 w-column-size pic is 99 occurs MAX-COLUMNS value zeros.
01 w-matrix.
05 filler occurs MAX-LINES.
10 filler occurs MAX-COLUMNS.
15 w-content pic is x(MAX-COLUMN-SIZE).
*>-> Output
01 w-line-out pic is x(120).
*>-> Data alignment
01 w-alignment pic is x(1).
88 alignment-left value is "L".
88 alignment-center value is "C".
88 alignment-right value is "R".
procedure division.
main.
move "Given$a$text$file$of$many$lines,$where$fields$within$a$line$" to w-line(1)
move "are$delineated$by$a$single$'dollar'$character,$write$a$program" to w-line(2)
move "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$" to w-line(3)
move "column$are$separated$by$at$least$one$space." to w-line(4)
move "Further,$allow$for$each$word$in$a$column$to$be$either$left$" to w-line(5)
move "justified,$right$justified,$or$center$justified$within$its$column." to w-line(6)
perform calculate-size-columns
set alignment-left to true
perform show-content
set alignment-center to true
perform show-content
set alignment-right to true
perform show-content
goback
.
calculate-size-columns.
perform
varying w-idx from 1 by 1
until w-idx > MAX-LINES
unstring w-line(w-idx) delimited by "$" into w-content(w-idx, 1), w-content(w-idx, 2),
w-content(w-idx, 3), w-content(w-idx, 4), w-content(w-idx, 5), w-content(w-idx, 6),
w-content(w-idx, 7), w-content(w-idx, 8), w-content(w-idx, 9), w-content(w-idx, 10),
w-content(w-idx, 11), w-content(w-idx, 12),
perform
varying w-idy from 1 by 1
until w-idy > MAX-COLUMNS
if function stored-char-length(w-content(w-idx, w-idy)) > w-column-size(w-idy)
move function stored-char-length(w-content(w-idx, w-idy)) to w-column-size(w-idy)
end-if
end-perform
end-perform
.
show-content.
move all "-" to w-line-out
display w-line-out
perform
varying w-idx from 1 by 1
until w-idx > MAX-LINES
move spaces to w-line-out
move 1 to w-pos
perform
varying w-idy from 1 by 1
until w-idy > MAX-COLUMNS
call "C$JUSTIFY" using w-content(w-idx, w-idy)(1:w-column-size(w-idy)), w-alignment
move w-content(w-idx, w-idy) to w-line-out(w-pos:w-column-size(w-idy))
compute w-pos = w-pos + w-column-size(w-idy) + 1
end-perform
display w-line-out
end-perform
.
- Output:
------------------------------------------------------------------------------------------------------------------------
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
------------------------------------------------------------------------------------------------------------------------
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
------------------------------------------------------------------------------------------------------------------------
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
CoffeeScript
pad = (n) ->
s = ''
while n > 0
s += ' '
n -= 1
s
align = (input, alignment = 'center') ->
tokenized_lines = (line.split '$' for line in input)
col_widths = {}
for line in tokenized_lines
for token, i in line
if !col_widths[i]? or token.length > col_widths[i]
col_widths[i] = token.length
padders =
center: (s, width) ->
excess = width - s.length
left = Math.floor excess / 2
right = excess - left
pad(left) + s + pad(right)
right: (s, width) ->
excess = width - s.length
pad(excess) + s
left: (s, width) ->
excess = width - s.length
s + pad(excess)
padder = padders[alignment]
for line in tokenized_lines
padded_tokens = (padder(token, col_widths[i]) for token, i in line)
console.log padded_tokens.join ' '
input = [
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
"are$delineated$by$a$single$'dollar'$character,$write$a$program"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
"column$are$separated$by$at$least$one$space."
"Further,$allow$for$each$word$in$a$column$to$be$either$left$"
"justified,$right$justified,$or$center$justified$within$its$column."
]
for alignment in ['center', 'right', 'left']
console.log "\n----- #{alignment}"
align input, alignment
- Output:
> coffee align_columns.coffee
----- center
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
----- right
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
----- left
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Common Lisp
(defun nonempty (seq)
(position-if (lambda (x) (declare (ignore x)) t) seq))
(defun split (delim seq)
"Splits seq on delim into a list of subsequences. Trailing empty
subsequences are removed."
(labels
((f (seq &aux (pos (position delim seq)))
(if pos
(cons
(subseq seq 0 pos)
(f (subseq seq (1+ pos))))
(list seq))))
(let* ((list (f seq))
(end (position-if #'nonempty list :from-end t)))
(subseq list 0 (1+ end)))))
(defun lengthen (list minlen filler-elem &aux (len (length list)))
"Destructively pads list with filler-elem up to minlen."
(if (< len minlen)
(nconc list (make-list (- minlen len) :initial-element filler-elem))
list))
(defun align-columns (text
&key (align :left)
&aux
(fmtmod (case align
(:left "@")
(:right ":")
(:center "@:")
(t (error "Invalid alignment."))))
(fields (mapcar (lambda (line) (split #\$ line))
(split #\Newline text)))
(mostcols (loop for l in fields
maximize (length l)))
widest)
(setf fields (mapcar (lambda (l) (lengthen l mostcols ""))
fields))
(setf widest (loop for col below (length (first fields))
collect (loop for row in fields
maximize (length (elt row col)))))
(format nil
(with-output-to-string (s)
(princ "~{~{" s)
(dolist (w widest)
(format s "~~~d~a<~~a~~>" (1+ w) fmtmod))
(princ "~}~%~}" s))
fields))
D
void main() {
import std.stdio, std.string, std.algorithm, std.range, std.typetuple;
immutable data =
"Given$a$txt$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."
.split.map!(r => r.chomp("$").split("$")).array;
size_t[size_t] maxWidths;
foreach (const line; data)
foreach (immutable i, const word; line)
maxWidths[i] = max(maxWidths.get(i, 0), word.length);
foreach (immutable just; TypeTuple!(leftJustify, center, rightJustify))
foreach (immutable line; data)
writefln("%-(%s %)", line.length.iota
.map!(i => just(line[i], maxWidths[i], ' ')));
}
- Output:
Given a txt file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a txt file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a txt file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Delphi
USES
StdCtrls, Classes, SysUtils, StrUtils, Contnrs;
procedure AlignByColumn(Output: TMemo; Align: TAlignment);
const
TextToAlign =
'Given$a$text$file$of$many$lines,$where$fields$within$a$line$'#$D#$A +
'are$delineated$by$a$single$''dollar''$character,$write$a$program'#$D#$A +
'that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$'#$D#$A +
'column$are$separated$by$at$least$one$space.'#$D#$A +
'Further,$allow$for$each$word$in$a$column$to$be$either$left$'#$D#$A +
'justified,$right$justified,$or$center$justified$within$its$column.';
var
TextLine, TempTString: TStringlist;
TextLines: TObjectList;
MaxLength, i, j: Byte;
OutPutString, EmptyString, Item: String;
begin
TRY
MaxLength := 0;
TextLines := TObjectList.Create(True);
TextLine := TStringList.Create;
TextLine.text := TextToAlign;
for i:= 0 to TextLine.Count - 1 do
begin
TempTString := TStringlist.create;
TempTString.text :=AnsiReplaceStr(TextLine[i], '$', #$D#$A);
TextLines.Add(TempTString);
end;
for i := 0 to TextLines.Count - 1 do
for j := 0 to TStringList(TextLines.Items[i]).Count - 1 do
If Length(TStringList(TextLines.Items[i])[j]) > MaxLength then
MaxLength := Length(TStringList(TextLines.Items[i])[j]);
If MaxLength > 0 then
MaxLength := MaxLength + 2; // Add to empty spaces to it
for i := 0 to TextLines.Count - 1 do
begin
OutPutString := '';
for j := 0 to TStringList(TextLines.Items[i]).Count - 1 do
begin
EmptyString := StringOfChar(' ', MaxLength);
Item := TStringList(TextLines.Items[i])[j];
case Align of
taLeftJustify: Move(Item[1], EmptyString[2], Length(Item));
taRightJustify: Move(Item[1], EmptyString[MaxLength - Length(Item) + 1], Length(Item));
taCenter: Move(Item[1], EmptyString[(MaxLength - Length(Item) + 1) div 2 + 1], Length(Item));
end;
OutPutString := OutPutString + EmptyString;
end;
Output.Lines.Add(OutPutString);
end;
FINALLY
FreeAndNil(TextLine);
FreeAndNil(TextLines);
END;
end;
E
pragma.enable("accumulator")
def left(width, word) {
return word + " " * (width - word.size())
}
def center(width, word) {
def leftCount := (width - word.size()) // 2
return " " * leftCount + word + " " * (width - word.size() - leftCount)
}
def right(width, word) {
return " " * (width - word.size()) + word
}
def alignColumns(align, text) {
def split := accum [] for line in text.split("\n") { _.with(line.split("$")) }
var widths := []
for line in split {
for i => word in line {
widths with= (i, widths.fetch(i, fn{0}).max(word.size()))
}
}
return accum "" for line in split {
_ + accum "" for i => word in line {
_ + align(widths[i] + 1, word)
} + "\n"
}
}
? def text := "Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."; null
? println(alignColumns(left, text))
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
? println(alignColumns(center, text))
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
? println(alignColumns(right, text))
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
EasyLang
global width inp$[] .
proc read . .
repeat
inp$ = input
until inp$ = ""
inp$[] &= inp$
ar$[] = strsplit inp$ "$"
for s$ in ar$[]
width = higher width len s$
.
.
.
read
#
proc out mode . .
for inp$ in inp$[]
ar$[] = strsplit inp$ "$"
for s$ in ar$[]
spc = width - len s$ + 1
if mode = 1
write s$
for i to spc
write " "
.
elif mode = 2
for i to spc
write " "
.
write s$
elif mode = 3
for i to spc div 2
write " "
.
write s$
for i to spc - spc div 2
write " "
.
.
.
print ""
.
.
out 1
print ""
out 2
print ""
out 3
#
input_data
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
Elixir
The String module of Elixir doesn't have the function of the center position adjusting. It calls and processes the function of 'Erlang'.
defmodule Align do
def columns(text, alignment) do
fieldsbyrow = String.split(text, "\n", trim: true)
|> Enum.map(fn row -> String.split(row, "$", trim: true) end)
maxfields = Enum.map(fieldsbyrow, fn field -> length(field) end) |> Enum.max
colwidths = Enum.map(fieldsbyrow, fn field -> field ++ List.duplicate("", maxfields - length(field)) end)
|> List.zip
|> Enum.map(fn column ->
Tuple.to_list(column) |> Enum.map(fn col-> String.length(col) end) |> Enum.max
end)
Enum.each(fieldsbyrow, fn row ->
Enum.zip(row, colwidths)
|> Enum.map(fn {field, width} -> adjust(field, width, alignment) end)
|> Enum.join(" ") |> IO.puts
end)
end
defp adjust(field, width, :Left), do: String.pad_trailing(field, width)
defp adjust(field, width, :Right), do: String.pad_leading(field, width)
defp adjust(field, width, _), do: :string.centre(String.to_charlist(field), width)
end
text = """
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
"""
Enum.each([:Left, :Right, :Center], fn alignment ->
IO.puts "\n# #{alignment} Column-aligned output:"
Align.columns(text, alignment)
end)
- Output:
# Left Column-aligned output: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. # Right Column-aligned output: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. # Center Column-aligned output: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Erlang
-module (align_columns).
-export([align_left/0, align_right/0, align_center/0]).
-define (Lines,
["Given\$a\$text\$file\$of\$many\$lines\$where\$fields\$within\$a\$line\$",
"are\$delineated\$by\$a\$single\$'dollar'\$character,\$write\$a\$program",
"that\$aligns\$each\$column\$of\$fields\$by\$ensuring\$that\$words\$in\$each\$",
"column\$are\$separated\$by\$at\$least\$one\$space.",
"Further,\$allow\$for\$each\$word\$in\$a\$column\$to\$be\$either\$left\$",
"justified,\$right\$justified,\$or\$center\$justified\$within\$its\$column."].
align_left()-> align_columns(left).
align_right()-> align_columns(right).
align_center()-> align_columns(centre).
align_columns(Alignment) ->
Words = [ string:tokens(Line, "\$") || Line <- ?Lines ],
Words_length = lists:foldl( fun max_length/2, [], Words),
Result = [prepare_line(Words_line, Words_length, Alignment)
|| Words_line <- Words],
[ io:fwrite("~s~n", [lists:flatten(Line)]) || Line <- Result],
ok.
max_length(Words_of_a_line, Acc_maxlength) ->
Line_lengths = [length(W) || W <- Words_of_a_line ],
Max_nb_of_length = lists:max([length(Acc_maxlength), length(Line_lengths)]),
Line_lengths_prepared = adjust_list (Line_lengths, Max_nb_of_length, 0),
Acc_maxlength_prepared = adjust_list(Acc_maxlength, Max_nb_of_length, 0),
Two_lengths =lists:zip(Line_lengths_prepared, Acc_maxlength_prepared),
[ lists:max([A, B]) || {A, B} <- Two_lengths].
adjust_list(L, Desired_length, Elem) ->
L++lists:duplicate(Desired_length - length(L), Elem).
prepare_line(Words_line, Words_length, Alignment) ->
All_words = adjust_list(Words_line, length(Words_length), ""),
Zipped = lists:zip (All_words, Words_length),
[ apply(string, Alignment, [Word, Length + 1, $\s])
|| {Word, Length} <- Zipped].
- Output:
1> c(align_columns). {ok,align_columns} 2> align_columns:align_center(). Given a text file of many lines where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. ok 3> align_columns:align_left(). Given a text file of many lines where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. ok 4> align_columns:align_right(). Given a text file of many lines where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. ok
Euphoria
constant data = {
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column."
}
function split(sequence s, integer c)
sequence out
integer first, delim
out = {}
first = 1
while first<=length(s) do
delim = find_from(c,s,first)
if delim = 0 then
delim = length(s)+1
end if
out = append(out,s[first..delim-1])
first = delim + 1
end while
return out
end function
function align(sequence s, integer width, integer alignment)
integer n
n = width - length(s)
if n <= 0 then
return s
elsif alignment < 0 then
return s & repeat(' ', n)
elsif alignment > 0 then
return repeat(' ', n) & s
else
return repeat(' ', floor(n/2)) & s & repeat(' ', floor(n/2+0.5))
end if
end function
integer maxlen
sequence lines
maxlen = 0
lines = repeat(0,length(data))
for i = 1 to length(data) do
lines[i] = split(data[i],'$')
for j = 1 to length(lines[i]) do
if length(lines[i][j]) > maxlen then
maxlen = length(lines[i][j])
end if
end for
end for
for a = -1 to 1 do
for i = 1 to length(lines) do
for j = 1 to length(lines[i]) do
puts(1, align(lines[i][j],maxlen,a) & ' ')
end for
puts(1,'\n')
end for
puts(1,'\n')
end for
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
F#
open System
open System.IO
let tableFromPath path =
let lines =
[ for line in File.ReadAllLines(path) -> (line.TrimEnd('$').Split('$')) ]
let width = List.fold (fun max (line : string[]) -> if max < line.Length then line.Length else max) 0 lines
List.map (fun (a : string[]) -> (List.init width (fun i -> if i < a.Length then a.[i] else ""))) lines
let rec trans m =
match m with
| []::_ -> []
| _ -> (List.map List.head m) :: trans (List.map List.tail m)
let colWidth table =
List.map (fun col -> List.max (List.map String.length col)) (trans table)
let left = (fun (s : string) n -> s.PadRight(n))
let right = (fun (s : string) n -> s.PadLeft(n))
let center = (fun (s : string) n -> s.PadLeft((n + s.Length) / 2).PadRight(n))
[<EntryPoint>]
let main argv =
let table = tableFromPath argv.[0]
let width = Array.ofList (colWidth table)
let format table align =
List.map (fun (row : string list) -> List.mapi (fun i s -> sprintf "%s" (align s width.[i])) row) table
|> List.iter (fun row -> printfn "%s" (String.Join(" ", Array.ofList row)))
for align in [ left; right; center ] do
format table align
printfn "%s" (new String('-', (Array.sum width) + width.Length - 1))
0
Output, when called with a file containing the sample input
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. -------------------------------------------------------------------------------------------------------- Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. -------------------------------------------------------------------------------------------------------- Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. --------------------------------------------------------------------------------------------------------
Factor
USING: fry io kernel math math.functions math.order sequences
splitting strings ;
IN: rosetta.column-aligner
CONSTANT: example-text "Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."
: split-and-pad ( text -- lines )
"\n" split [ "$" split harvest ] map
dup [ length ] [ max ] map-reduce
'[ _ "" pad-tail ] map ;
: column-widths ( columns -- widths )
[ [ length ] [ max ] map-reduce ] map ;
SINGLETONS: +left+ +middle+ +right+ ;
GENERIC: align-string ( str n alignment -- str' )
M: +left+ align-string drop CHAR: space pad-tail ;
M: +right+ align-string drop CHAR: space pad-head ;
M: +middle+ align-string
drop
over length - 2 /
[ floor CHAR: space <string> ]
[ ceiling CHAR: space <string> ] bi surround ;
: align-columns ( columns alignment -- columns' )
[ dup column-widths ] dip '[
[ _ align-string ] curry map
] 2map ;
: print-aligned ( text alignment -- )
[ split-and-pad flip ] dip align-columns flip
[ [ write " " write ] each nl ] each ;
example-text { +left+ +middle+ +right+ } [ print-aligned ] with each
FBSL
Using a multiline string:
#APPTYPE CONSOLE
DIM s = "Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."
DIM lines[] = SPLIT(s, CRLF), tokens[], l, t, length, margin, justify = "center"
FOREACH l IN lines
tokens = SPLIT(l, "$")
FOREACH t IN tokens
IF STRLEN(t) > length THEN length = INCR(STRLEN)
NEXT
NEXT
FOREACH l IN lines
tokens = SPLIT(l, "$")
FOREACH t IN tokens
SELECT CASE justify
CASE "left"
PRINT t, SPACE(length - STRLEN(t));
CASE "center"
margin = (length - STRLEN(t)) \ 2
PRINT SPACE(margin), t, SPACE(length - STRLEN - margin);
CASE "right"
PRINT SPACE(length - STRLEN(t)), t;
END SELECT
NEXT
PRINT
NEXT
PAUSE
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Press any key to continue...
Forth
\ align columns
: split ( addr len char -- addr len1 addr len-len1 )
>r 2dup r> scan 2swap 2 pick - ;
variable column
: for-each-line ( file len xt -- )
>r begin #lf split r@ execute 1 /string dup 0<= until 2drop rdrop ;
: for-each-field ( line len xt -- )
0 column !
>r begin '$ split r@ execute 1 column +! 1 /string dup 0<= until 2drop rdrop ;
0 value num-columns
: count-columns ( line len -- )
['] 2drop for-each-field
num-columns column @ max to num-columns ;
: find-num-columns ( file len -- )
0 to num-columns
['] count-columns for-each-line ;
0 value column-widths
: column-width ( field len -- )
column-widths column @ + c@
max
column-widths column @ + c!
drop ;
: measure-widths ( line len -- )
['] column-width for-each-field ;
: find-column-widths ( file len -- )
num-columns allocate throw to column-widths
column-widths num-columns erase
['] measure-widths for-each-line ;
\ type aligned, same naming convention as standard numeric U.R, .R
: type.l ( addr len width -- )
over - >r type r> spaces ;
: type.c ( addr len width -- )
over - dup 2/ spaces >r type r> 1+ 2/ spaces ;
: type.r ( addr len width -- )
over - spaces type ;
defer type.aligned
: print-field ( field len -- )
column-widths column @ + c@ type.aligned space ;
: print-line ( line len -- ) cr ['] print-field for-each-field ;
: print-fields ( file len -- ) ['] print-line for-each-line ;
\ read file
s" columns.txt" slurp-file ( file len )
\ scan once to determine num-columns
2dup find-num-columns
\ scan again to determine column-widths
2dup find-column-widths
\ print columns, once for each alignment type
' type.l is type.aligned 2dup print-fields cr
' type.c is type.aligned 2dup print-fields cr
' type.r is type.aligned 2dup print-fields cr
\ cleanup
nip free throw
column-widths free throw
Fortran
For the general situation, a utility has no knowledge of the maximum number of fields in a record nor the maximum length of a record, still less knowledge of the sizes of the fields in the records. Decent file systems (for example, that of the Burroughs 6700) make available the MaxRecordLength of a file when a file is opened, but many systems are less than helpful. It is possible to open a file as UNFORMATTED and then simply read sequences of binary data to be interpreted to taste, but in the ASCII world that means deciding on record markers being CR, CRLF, LF, or LFCR and I have encountered files with mixtures... In any case, a file with a fixed record length will likely not contain any such markers.
The plan here is to read the file to find out. But, given that the maximum record length is unknown, reading records into some storage area is problematical. Some systems can create a "string" variable via the read statement that will be of the proper size, but older Fortran works always with storage sizes fixed at compile time. However, after F77 started being extended, a common extension was the Q-element in FORMAT statements, which instead of interpreting the content of a record, reports instead the number of characters yet unread in a record. Thus, a statement like READ(in,"(Q)") L
will read a record of input and the first action is to place in variable L the number of characters yet to be processed of that record. Since the content of the record is not being transferred, there is no need for a CHARACTER area of sufficient size to receive all of it. Indeed here, nothing is read. As for the LF/CRLF/LFCR/CR issue, with FORMATTED input the file system makes its decision and presents record content without incorporating such out-of-context data.
When data are being read into a CHARACTER variable, once the receiver is filled subsequent data in a long record will be ignored, and if the input record was smaller than the variable, trailing spaces will be supplied to fill out the variable. It is for this reason that the read statement is READ (IN,11,END = 20) L,ACARD(1:L)
so that, on-the-fly, the length of the record is determined, and then only that number of characters are placed in ACARD with no (possibly large number of) trailing spaces being appended. Naturally, subsequent inspection of ACARD will have to be careful not to look beyond character L, where detritus from previous usage will languish.
Once the main programme has ascertained the maximum record length, subroutine RAKE can be invoked with this as a parameter. From F90 on, as introduced by Algol in the 1960s, functions and subroutines have been allowed to declare arrays of a size specified by a variable and so the "surely big enough" issue is reduced. Thus, given a maximum length of M, a record containing M field delimiters can represent M + 1 fields, all null. The last field's delimiter is the end-of-record, so one more. It is also possible to use ALLOCATE(...) to request storage of suitable dimension for a variable within a routine, but that introduces verbiage. So, a programme can request just enough storage for its particular tasks and thereby possibly succeed on a problem too large for an always-big-enough storage scheme, but on the other hand, the fixed storage allocation scheme doesn't suddenly run out in the middle of a job.
Accordingly, a second scan of the records of the text file can be made, with a view to ascertaining the maximum widths for the first, second, etc. columns. This is done by storing in array C the positions of the delimiters in the text, so the content of a field i on a record will be starting with C(I - 1) + 1, and ending with C(I) - 1, - that is, the first character following a delimiter to the last character before a delimiter. In other words, the delimiter is not a part of the field's content. For convenience in this, C(0) = 0, since the first field is number one, and the last field's delimiter is one past the end of the record. Having an array start with non-default bounds is a feature of F90, similarly the array assignment that tracks the maximum field widths in array W. The specification makes no call for leading or trailing spaces in a field's content to be trimmed; if it did then two sets of fingers would be used to mark the first and last position of each text. Happily, there is also no call to recognise quoted texts, that might contain delimiter characters that are not delimiters.
Equipped at last with knowledge of each column's maximum width, yet another pass can be made through the file to produce the output. A feature of the format code Aw is that text is aligned to the right within the width of w. So, concoct a FORMAT text with suitable Aw entries, also augmenting the width by one for each column to meet the requirement that each column's content is separated from the others by at least one space. This concoction is easy enough, and could be improved by taking advantage of the "factoring" that format statements allow so that for example "A7,A7" can be replaced by "2A7", and further, bracketing of sequences is allowed and with repeat counts for them also. Alas, finding the minimum sequence is in general a very difficult problem, so no attempt is made. As for "sufficient storage" for the FORMAT variable, a two-digit width specification seems sufficient so each field's format code would be "Add," - four characters. Only later Fortran allows the I0 format code, meaning that an integer will be written only with sufficient digits, not a fixed "sufficiency" of digits. A pity the code for this isn't just "I" rather than "I0" which implies a width of zero.
A difficulty now arises in terminating the format text with the closing bracket. This is done by searching for the sequence ", " and replacing the comma by the closing bracket. This is present only because format 21 specifies <MF> as a repeat count. If it were say 666 instead, after the last W value was written the format processing would cycle back to its next repetition, write out an "A", then stop since there is no W value to write via the "I0" format code. Thus, the format text ends ",A" and the INDEX fails to find the desired ", ". It could instead search for ",A " (just ",A" would stop on the second field's format code) but ", " seems clear. The <MF> usage is standard only for recent Fortran. Formatted output opportunities are many and options numerous. Other schemes could be used, such as the write statement specifying the text literals in its items, but that would require an implied-DO output list and it seemed nicer to be able to use the array specification W(1:MF) instead.
Given a FORMAT text that produces output in aligned columns makes it easy enough to meet the other requirements. To cause texts to be aligned left, append sufficient spaces to each output text, and for centred text, half that number. This relies on the special intrinsic function REPEAT(text,n) returning a varying number of characters - CHARACTER functions have to return a fixed number of characters, until the standardisation of varying-length strings in F2003 et seq. Earlier Fortrans lack the REPEAT function, but its effect can be gained via something like CHARACTER*66 SPACE, where SPACE is set to spaces, and SPACE(1:N) is used where REPEAT(" ",N) is desired. And if messing with variable FORMAT is unwanted, the REPEAT scheme can be used for the right-justified output also.
SUBROUTINE RAKE(IN,M,X,WAY) !Casts forth text in fixed-width columns.
Collates column widths so that each column is wide enough for its widest member.
INTEGER IN !Fingers the input file.
INTEGER M !Maximum record length thereof.
CHARACTER*1 X !The delimiter, possibly a comma.
INTEGER WAY !Alignment style.
INTEGER W(M + 1) !If every character were X in the maximum-length record,
INTEGER C(0:M + 1) !Then M + 1 would be the maximum number of fields possible.
CHARACTER*(M) ACARD !A scratchpad big enough for the biggest.
CHARACTER*(28 + 4*M) FORMAT !Guess. Allow for "Ann," per field.
INTEGER I !A stepper.
INTEGER L,LF !Text fingers.
INTEGER NF,MF !Field counts.
CHARACTER*6 WAYNESS(-1:+1) !Some annotation may be helpful.
PARAMETER (WAYNESS = (/"Left","Centre","Right"/)) !Using normal language.
INTEGER LINPR !The mouthpiece.
COMMON LINPR !Used all over.
W = 0 !Maximum field widths so far seen.
MF = 0 !Maximum number of fields to a record.
C(0) = 0 !Syncopation for the first field's predecessor.
WRITE (LINPR,*) !Some separation.
WRITE (LINPR,*) "Align ",WAYNESS(MIN(MAX(WAY,-1),+1)) !Explain, cautiously.
Chase through the file assessing the lengths of each field.
10 READ (IN,11,END = 20) L,ACARD(1:L) !Grab a record.
11 FORMAT (Q,A) !Working only up to its end.
CALL LIZZIEBORDEN !Find the chop points.
W(1:NF) = MAX(W(1:NF),C(1:NF) - C(0:NF - 1) - 1) !Thereby the lengths between.
MF = MAX(MF,NF) !Also want to know the most number of chops.
GO TO 10 !Get the next record.
Concoct a FORMAT based on the maximum size of each field. Plus one.
20 REWIND(IN) !Back to the beginning.
WRITE (FORMAT,21) W(1:MF) + 1 !Add one to meet the specified at least one space between columns.
21 FORMAT ("(",<MF>("A",I0,",")) !Generates a sequence of An, items.
LF = INDEX(FORMAT,", ") !The last one has a trailing comma.
IF (LF.LE.0) STOP "Format trouble!" !Or, maybe not!
FORMAT(LF:LF) = ")" !Convert it to the closing bracket.
WRITE (LINPR,*) "Format",FORMAT(1:LF) !Present it.
Chug afresh, this time knowing the maximum length of each field.
30 READ (IN,11,END = 40) L,ACARD(1:L) !Place just the record's content.
CALL LIZZIEBORDEN !Find the chop points.
SELECT CASE(WAY) !What is to be done?
CASE(-1) !Shove leftwards by appending spaces.
WRITE (LINPR,FORMAT) (ACARD(C(I - 1) + 1:C(I) - 1)// !The chopped text.
1 REPEAT(" ",W(I) - C(I) + C(I - 1) + 1),I = 1,NF) !Some spaces.
CASE( 0) !Centre by appending half as many spaces.
WRITE (LINPR,FORMAT) (ACARD(C(I - 1) + 1:C(I) - 1)// !The chopped text.
1 REPEAT(" ",(W(I) - C(I) + C(I - 1) + 1)/2),I = 1,NF) !Some spaces.
CASE(+1) !Align rightwards is the default style.
WRITE (LINPR,FORMAT) (ACARD(C(I - 1) + 1:C(I) - 1),I = 1,NF) !So, just the texts.
CASE DEFAULT !This shouldn't happen.
WRITE (LINPR,*) "Huh? WAY=",WAY !But if it does,
STOP "Unanticipated value for WAY!" !Explain.
END SELECT !So much for that record.
GO TO 30 !Go for another.
Closedown
40 REWIND(IN) !Be polite.
CONTAINS !This also marks the end of source for RAKE...
SUBROUTINE LIZZIEBORDEN !Take an axe to ACARD, chopping at X.
NF = 0 !No strokes so far.
DO I = 1,L !So, step away.
IF (ICHAR(ACARD(I:I)).EQ.ICHAR(X)) THEN !Here?
NF = NF + 1 !Yes!
C(NF) = I !The place!
END IF !So much for that.
END DO !On to the next.
NF = NF + 1 !And the end of ACARD is also a chop point.
C(NF) = L + 1 !As if here.
END SUBROUTINE LIZZIEBORDEN !She was aquitted.
END SUBROUTINE RAKE !So much raking over.
INTEGER L,M,N !To be determined the hard way.
INTEGER LINPR,IN !I/O unit numbers.
COMMON LINPR !Some of general note.
LINPR = 6 !Standard output via this unit number.
IN = 10 !Some unit number for the input file.
OPEN (IN,FILE="Rake.txt",STATUS="OLD",ACTION="READ") !For formatted input.
N = 0 !No records read.
M = 0 !Longest record so far.
1 READ (IN,2,END = 10) L !How long is this record?
2 FORMAT (Q) !Obviously, Q specifies the length, not a content field.
N = N + 1 !Anyway, another record has been read.
M = MAX(M,L) !And this is the longest so far.
GO TO 1 !Go back for more.
10 REWIND (IN) !We're ready now.
WRITE (LINPR,*) N,"Recs, longest rec. length is ",M
CALL RAKE(IN,M,"$",-1) !Align left.
CALL RAKE(IN,M,"$", 0) !Centre.
CALL RAKE(IN,M,"$",+1) !Align right.
END !That's all.
Every line of output starts with a space, and if it were to be sent to a lineprinter, this would be used as the carriage control character (meaning, advance one line then print the rest) - the first column does not need to be set off by one space from the previous column, but rather than devise special treatment it is spaced off anyway. The free-format output statements also start with a space. Output:
6 Recs, longest rec. length is 66 Align Left Format(A11,A11,A11,A7,A7,A10,A11,A9,A8,A8,A7,A5,A1) Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Align Centre Format(A11,A11,A11,A7,A7,A10,A11,A9,A8,A8,A7,A5,A1) Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Align Right Format(A11,A11,A11,A7,A7,A10,A11,A9,A8,A8,A7,A5,A1) Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
FreeBASIC
' FB 1.05.0 Win64
Sub Split(s As String, sep As String, result() As String)
Dim As Integer i, j, count = 0
Dim temp As String
Dim As Integer position(Len(s) + 1)
position(0) = 0
For i = 0 To Len(s) - 1
For j = 0 To Len(sep) - 1
If s[i] = sep[j] Then
count += 1
position(count) = i + 1
End If
Next j
Next i
position(count + 1) = Len(s) + 1
Redim result(count)
For i = 1 To count + 1
result(i - 1) = Mid(s, position(i - 1) + 1, position(i) - position(i - 1) - 1)
Next
End Sub
Sub CSet(buffer As String, s As Const String)
Dim As Integer bLength = Len(buffer)
Dim As Integer sLength = Len(s)
Dim As Integer diff, lSpaces
If sLength >= bLength Then
LSet buffer, s
Else
diff = bLength - sLength
lSpaces = diff \ 2
LSet buffer, Space(lSpaces) + s
End If
End Sub
Dim lines() As String
Dim count As Integer = 0
Open "align_columns.txt" For Input As #1
While Not Eof(1)
Redim Preserve lines(count)
Line Input #1, lines(count)
count +=1
Wend
Close #1
Dim As Integer i,j, length, numColumns = 0
Dim As Integer numLines = UBound(lines) + 1
Dim fields() As String
' Work out the maximum number of columns
For i = 0 To numLines - 1
Erase fields
Split RTrim(lines(i), "$"), "$", fields()
length = UBound(fields) + 1
If length > numColumns Then numColumns = length
Next
' Split lines into fields and work out maximum size of each column
Dim matrix(numLines - 1, numColumns - 1) As String
Dim columnSizes(numColumns - 1) As Integer
For i = 0 To numLines - 1
Erase fields
Split RTrim(lines(i), "$"), "$", fields()
For j = 0 To UBound(fields)
matrix(i, j) = fields(j)
length = Len(fields(j))
If length > columnSizes(j) Then columnSizes(j) = length
Next j
Next i
Dim buffer As String
'Separate each column by 2 spaces
Open "align_left_columns.txt" For Output As #1
Open "align_right_columns.txt" For Output As #2
Open "align_center_columns.txt" For Output As #3
For i = 0 To UBound(matrix, 1)
For j = 0 To UBound(matrix, 2)
buffer = Space(columnSizes(j))
LSet buffer, matrix(i, j)
Print #1, buffer;
RSet buffer, matrix(i, j)
Print #2, buffer;
CSet buffer, matrix(i, j)
Print #3, buffer;
If j < UBound(matrix, 2) Then
Print #1, " "; : Print #2, " "; : Print #3, " ";
End If
Next j
Print #1, : Print #2, : Print #3,
Next i
Close #1 : Close #2 : Close #3
- Output:
--- align_columns.txt Given$a$text$file$of$many$lines,$where$fields$within$a$line$ are$delineated$by$a$single$'dollar'$character,$write$a$program that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$ column$are$separated$by$at$least$one$space. Further,$allow$for$each$word$in$a$column$to$be$either$left$ justified,$right$justified,$or$center$justified$within$its$column. --- align_left_columns.txt Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. --- align_right_columns.txt Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. --- align_center_columns.txt Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
FutureBasic
Note: FB's NSLog, used for demonstrations, does not have a center alignment provision. However FB allows advanced alignment and text formatting in normal application development. Simple right and left alignment are shown here.
include "NSLog.incl"
local fn AlignColumn
NSUInteger i
CFStringRef testStr = @"Given$a$text$file$of$many$lines,$where$fields$within$a$line$are$delineated$by¬
$a$single$'dollar'$character,$write$a$program$that$aligns$each$column$of$fields$by$ensuring$that$words¬
$in$each$column$are$separated$by$at$least$one$space.$Further,$allow$for$each$word$in$a$column$to$be¬
$either$left$justified$right$justified,$or$center$justified$within$its$column."
CFArrayRef temp = fn StringComponentsSeparatedByString( testStr, @"$" )
CFMutableArrayRef arr = fn MutableArrayWithArray( temp )
NSUInteger count = fn ArrayCount( arr )
ptr a(50)
NSLog( @"\nLeft aligned:\n" )
NSUInteger lineCheck = 1
for i = 0 to count -1
a( lineCheck ) = (ptr)fn StringUTF8String( arr[i] )
if ( lineCheck == 9 )
NSLog( @"%-12s %-11s %-12s %-11s %-12s %-12s %-12s %-12s %-12s", a(1),a(2),a(3),a(4),a(5),a(6),a(7),a(8),a(9) )
lineCheck = 1
else
lineCheck++
end if
next
NSLog( @"\n\nRight aligned:\n" )
lineCheck = 1
for i = 0 to count -1
a( lineCheck ) = (ptr)fn StringUTF8String( arr[i] )
if ( lineCheck == 9 )
NSLog( @"%12s %11s %12s %11s %12s %12s %12s %12s %12s", a(1),a(2),a(3),a(4),a(5),a(6),a(7),a(8),a(9) )
lineCheck = 1
else
lineCheck++
end if
next
end fn
fn AlignColumn
HandleEvents
- Output:
Left aligned: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified right justified, or center justified within its column. Right aligned: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified right justified, or center justified within its column.
Gambas
Click this link to run this code
Public Sub Main() 'Written in Gambas 3.9.2 as a Command line Application - 15/03/2017
Dim siCount, siCounter, siLength As Short 'Counters
Dim siLongest As Short = -1 'To store the longest 'Word'
Dim sLine, sRows As New String[] 'Arrays
Dim sTemp, sAlign As String 'Temp strings
Dim sInput As String = "Given$a$text$file$of$many$lines, $where$fields$within$a$line$" & "\n"
"are$delineated$by$a$single$ 'dollar'$character,$write$a$program" & "\n"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$" & "\n"
"column$are$separated$by$at$least$one$space." & "\n"
"Further, $allow$for$each$word$in$a$column$to$be$either$left$" & "\n"
"justified, $right$justified, $or$center$justified$within$its$column." 'Main string (with End Of Line characters added)
For Each sTemp In Split(sInput, "\n") 'For each Line (split by End of Line character)..
sLine.add(sTemp) 'Add the Line to sLine array
Next
For siCount = 0 To sLine.Max 'For each of Lines in the array..
For Each sTemp In Split(sLine[siCount], "$") 'For each 'Word' in the Line (Split by the '$')
siLength = Len(sTemp) 'Store the length of the current 'Word'
If siLength > siLongest Then siLongest = siLength 'Make sure siLength has the length of the longest 'Word'
sRows.add(Trim(sTemp)) 'Create an array of the 'Words'
Next
sRows.add("\n") 'Add a End Of Line character to the sRows array
Next
For siCounter = 0 To 2 'For each alignment (Left, Right and Centre)
For Each sTemp In sRows 'For each 'Word' in the sRows array..
If sTemp = "\n" Then 'If it's a End Of Line character then..
Print 'Print
Continue 'Jump to the next iteration of the For Next Loop
Endif
If siCounter = 0 Then Print sTemp & Space(siLongest - Len(sTemp)); 'Print control for Left align
If siCounter = 1 Then Print Space(siLongest - Len(sTemp)) & sTemp; 'Print control for Right align
If siCounter = 2 Then 'Print control for Centre align
siCount = (siLongest - Len(sTemp)) / 2 'Difference between the length of the longest 'Word' and the current 'Word' / 2
sAlign = Space(siCount) & sTemp & Space(siCount) 'Put the string together for printing
If Len(sAlign) < siLongest Then sAlign &= " " 'Check it's the correct length if not add a space on the end
Print sAlign; 'Print the 'Word'
Endif
Next
Print 'Print an empty line between each alignment list
Next
End
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Go
package main
import (
"fmt"
"strings"
)
const text = `Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.`
type formatter struct {
text [][]string
width []int
}
func newFormatter(text string) *formatter {
var f formatter
for _, line := range strings.Split(text, "\n") {
words := strings.Split(line, "$")
for words[len(words)-1] == "" {
words = words[:len(words)-1]
}
f.text = append(f.text, words)
for i, word := range words {
if i == len(f.width) {
f.width = append(f.width, len(word))
} else if len(word) > f.width[i] {
f.width[i] = len(word)
}
}
}
return &f
}
const (
left = iota
middle
right
)
func (f formatter) print(j int) {
for _, line := range f.text {
for i, word := range line {
fmt.Printf("%-*s ", f.width[i], fmt.Sprintf("%*s",
len(word)+(f.width[i]-len(word))*j/2, word))
}
fmt.Println("")
}
fmt.Println("")
}
func main() {
f := newFormatter(text)
f.print(left)
f.print(middle)
f.print(right)
}
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Groovy
Solution:
def alignColumns = { align, rawText ->
def lines = rawText.tokenize('\n')
def words = lines.collect { it.tokenize(/\$/) }
def maxLineWords = words.collect {it.size()}.max()
words = words.collect { line -> line + [''] * (maxLineWords - line.size()) }
def columnWidths = words.transpose().collect{ column -> column.collect { it.size() }.max() }
def justify = [ Right : { width, string -> string.padLeft(width) },
Left : { width, string -> string.padRight(width) },
Center : { width, string -> string.center(width) } ]
def padAll = { pad, colWidths, lineWords -> [colWidths, lineWords].transpose().collect { pad(it) + ' ' } }
words.each { padAll(justify[align], columnWidths, it).each { print it }; println() }
}
Test Program:
def rawTextInput = '''Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.'''
['Left', 'Center', 'Right'].each { align ->
println "${align} Justified:"
alignColumns(align, rawTextInput)
println()
}
- Output:
Left Justified: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Center Justified: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Right Justified: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Harbour
PROCEDURE Main()
LOCAL a := { "Given$a$text$file$of$many$lines,$where$fields$within$a$line$",;
"are$delineated$by$a$single$'dollar'$character,$write$a$program",;
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",;
"column$are$separated$by$at$least$one$space.",;
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",;
"justified,$right$justified,$or$center$justified$within$its$column." }
LOCAL e, nMax
// remove trailing dollars
AEval( a, {|e,n| Iif( Right(e,1)=="$", a[n] := hb_StrShrink( e, 1 ), NIL ) } )
// find max word length
nMax := 0
AEval( a, {|e| AEval( hb_Atokens( e, "$"), {|i| nMax := Max( nMax, Len(i) )} ) } )
nMax++
// start printing, padding words as needed
?
? "----Left aligned columns----"
FOR EACH e IN a
?
AEval( hb_Atokens( e, "$"), {|i| QQout( PadR(i, nMax) )} )
NEXT
?
? "----Center aligned columns----"
FOR EACH e IN a
?
AEval( hb_Atokens( e, "$"), {|i| QQout( PadC(i, nMax) )} )
NEXT
?
? "----Right aligned columns----"
FOR EACH e IN a
?
AEval( hb_Atokens( e, "$"), {|i| QQout( PadL(i, nMax) )} )
NEXT
RETURN
Output:
----Left aligned columns----
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
----Center aligned columns----
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
----Right aligned columns----
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Haskell
import Data.List (unfoldr, transpose)
import Control.Arrow (second)
dat =
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n" ++
"are$delineated$by$a$single$'dollar'$character,$write$a$program\n" ++
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n" ++
"column$are$separated$by$at$least$one$space.\n" ++
"Further,$allow$for$each$word$in$a$column$to$be$either$left$\n" ++
"justified,$right$justified,$or$center$justified$within$its$column.\n"
brkdwn =
takeWhile (not . null) . unfoldr (Just . second (drop 1) . span ('$' /=))
format j ls = map (unwords . zipWith align colw) rows
where
rows = map brkdwn $ lines ls
colw = map (maximum . map length) . transpose $ rows
align cw w =
case j of
'c' -> replicate l ' ' ++ w ++ replicate r ' '
'r' -> replicate dl ' ' ++ w
'l' -> w ++ replicate dl ' '
where
dl = cw - length w
(l, r) = (dl `div` 2, dl - l)
- Output:
*Main> mapM_ putStrLn $ format 'c' dat Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Or, using Text and its functions as an alternative to [Char] strings:
import Prelude as P
import Data.Text as T
(Text, pack, unpack, splitOn, unlines, unwords, length,
justifyLeft, justifyRight, center)
import Data.List (transpose, zip, maximumBy)
import Data.Ord (comparing)
rows :: [[Text]]
rows =
(splitOn (pack "$") . pack) <$>
[ "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
, "are$delineated$by$a$single$'dollar'$character,$write$a$program"
, "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
, "column$are$separated$by$at$least$one$space."
, "Further,$allow$for$each$word$in$a$column$to$be$either$left$"
, "justified,$right$justified,$or$center$justified$within$its$column."
]
cols :: [[Text]]
cols =
transpose $
((++) <*>
(flip P.replicate (pack []) .
(-) (maximum (P.length <$> rows)) . P.length)) <$>
rows
main :: IO ()
main =
mapM_ putStrLn $
[ (\cols f ->
(unpack . T.unlines) $
T.unwords <$> transpose ((\(xs, n) -> f (n + 1) ' ' <$> xs) <$> cols))
(zip cols ((T.length . maximumBy (comparing T.length)) <$> cols))
] <*>
[justifyLeft, justifyRight, center]
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
HicEst
A file opened with a Format option describing the column format(s) can be addressed like a standard in-memory array. In addition the DLG function (MatrixExplorer) allows this text/numeric file to be edited or visualized in many ways, but string columns are always left adjusted while numeric columns are right adjusted. Export is possible.
CHARACTER Fnam = "\HicEst\Rosetta\Align columns.txt"
OPEN(FIle=Fnam, Format="12$", LENgth=rows)
! call the DLG function in MatrixExplorer mode:
DLG(Edit=Fnam, Format='12A10') ! left adjusted, 12 columns, 10 spaces each
! or the standard way:
CALL Align( "LLLLLLLLLLL ", Fnam, rows) ! left align
CALL Align( "CCCCCCCCCCC ", Fnam, rows) ! center align
CALL Align( "RRRRRRRRRRR ", Fnam, rows) ! right align
END
SUBROUTINE Align(picture, filename, rows)
CHARACTER picture, filename
CHARACTER out*400, txt*20
W = LEN(picture)
DO i = 1, rows
out = " "
DO j = 0, 100
txt = filename(i, j+1, *9) ! on error branch to label 9
WRITE(Text=out(j*W+1 : ), Format=picture) txt
ENDDO
9 CONTINUE
WRITE() out
ENDDO
END
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Icon and Unicon
An argument of left, center, or right controls the column alignment. The default is left-alignment.
Sample run:
->align right <align.txt Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. ->
J
Here, we rely on J's built-in formatting mechanism for boxed arrays, with spaces to separate the columns.
(J's 9!:n series of conjunctions queries (even) or sets (odd) session parameters. 9!:6 queries the box display characters, and 9!:7 sets them. Here, we use spaces with 9!:7 (discarding the blank rows). Meanwhile 9!:17 determines whether box contents are left justified, center justified or right justified, and we also use that. There's some additional discussion of this approach on the talk page.)
Solution
'LEFT CENTER RIGHT'=: i.3 NB. justification constants
NB.* alignCols v Format delimited text in justified columns
NB. y: text to format
NB. rows marked by last character in text
NB. columns marked by $
NB. optional x: justification. Default is LEFT
NB. result: text table
alignCols=: verb define
LEFT alignCols y NB. default
:
global=. dyad def'9!:x y'each
oldbox=. 6 16 global '';'' NB. save settings
7 17 global (11#' ');,~x NB. apply new settings
result=. _2{:\ ": <;._2 @:,&'$';._2 y NB. parse & format text
7 17 global oldbox NB. restore settings
result
)
Example:
text=: noun define
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
)
alignCols text NB. default justification
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
CENTER alignCols text NB. specify desired justification as left argument
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Java
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
/**
* Aligns fields into columns, separated by "|"
*/
public class ColumnAligner {
private List<String[]> words = new ArrayList<>();
private int columns = 0;
private List<Integer> columnWidths = new ArrayList<>();
/**
* Initialize columns aligner from lines in a single string
*
* @param s
* lines in a single string. Empty string does form a column.
*/
public ColumnAligner(String s) {
String[] lines = s.split("\\n");
for (String line : lines) {
processInputLine(line);
}
}
/**
* Initialize columns aligner from lines in a list of strings
*
* @param lines
* lines in a single string. Empty string does form a column.
*/
public ColumnAligner(List<String> lines) {
for (String line : lines) {
processInputLine(line);
}
}
private void processInputLine(String line) {
String[] lineWords = line.split("\\$");
words.add(lineWords);
columns = Math.max(columns, lineWords.length);
for (int i = 0; i < lineWords.length; i++) {
String word = lineWords[i];
if (i >= columnWidths.size()) {
columnWidths.add(word.length());
} else {
columnWidths.set(i, Math.max(columnWidths.get(i), word.length()));
}
}
}
interface AlignFunction {
String align(String s, int length);
}
/**
* Left-align all columns
*
* @return Lines, terminated by "\n" of columns, separated by "|"
*/
public String alignLeft() {
return align(new AlignFunction() {
@Override
public String align(String s, int length) {
return StringUtils.rightPad(s, length);
}
});
}
/**
* Right-align all columns
*
* @return Lines, terminated by "\n" of columns, separated by "|"
*/
public String alignRight() {
return align(new AlignFunction() {
@Override
public String align(String s, int length) {
return StringUtils.leftPad(s, length);
}
});
}
/**
* Center-align all columns
*
* @return Lines, terminated by "\n" of columns, separated by "|"
*/
public String alignCenter() {
return align(new AlignFunction() {
@Override
public String align(String s, int length) {
return StringUtils.center(s, length);
}
});
}
private String align(AlignFunction a) {
StringBuilder result = new StringBuilder();
for (String[] lineWords : words) {
for (int i = 0; i < lineWords.length; i++) {
String word = lineWords[i];
if (i == 0) {
result.append("|");
}
result.append(a.align(word, columnWidths.get(i)) + "|");
}
result.append("\n");
}
return result.toString();
}
public static void main(String args[]) throws IOException {
if (args.length < 1) {
System.out.println("Usage: ColumnAligner file [left|right|center]");
return;
}
String filePath = args[0];
String alignment = "left";
if (args.length >= 2) {
alignment = args[1];
}
ColumnAligner ca = new ColumnAligner(Files.readAllLines(Paths.get(filePath), StandardCharsets.UTF_8));
switch (alignment) {
case "left":
System.out.print(ca.alignLeft());
break;
case "right":
System.out.print(ca.alignRight());
break;
case "center":
System.out.print(ca.alignCenter());
break;
default:
System.err.println(String.format("Error! Unknown alignment: '%s'", alignment));
break;
}
}
}
JavaScript
Imperative
var justification="center",
input=["Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column."],
x,y,cols,max,cols=0,diff,left,right
String.prototype.repeat=function(n){return new Array(1 + parseInt(n)).join(this);}
for(x=0;x<input.length;x++) {
input[x]=input[x].split("$");
if(input[x].length>cols) cols=input[x].length;
}
for(x=0;x<cols;x++) {
max=0;
for(y=0;y<input.length;y++) if(input[y][x]&&max<input[y][x].length) max=input[y][x].length;
for(y=0;y<input.length;y++)
if(input[y][x]) {
diff=(max-input[y][x].length)/2;
left=" ".repeat(Math.floor(diff));
right=" ".repeat(Math.ceil(diff));
if(justification=="left") {right+=left;left=""}
if(justification=="right") {left+=right;right=""}
input[y][x]=left+input[y][x]+right;
}
}
for(x=0;x<input.length;x++) input[x]=input[x].join(" ");
input=input.join("\n");
document.write(input);
Functional
//break up each string by '$'. The assumption is that the user wants the trailing $.
var data = [
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column."
].map(function (str) { return str.split('$'); })
//boilerplate: get longest array or string in array
var getLongest = function (arr) {
return arr.reduce(function (acc, item) { return acc.length > item.length ? acc : item; }, 0);
};
//boilerplate: this function would normally be in a library like underscore, lodash, or ramda
var zip = function (items, toInsert) {
toInsert = (toInsert === undefined) ? null : toInsert;
var longestItem = getLongest(items);
return longestItem.map(function (_unused, index) {
return items.map(function (item) {
return item[index] === undefined ? toInsert : item[index];
});
});
};
//here's the part that's not boilerplate
var makeColumns = function (formatting, data) {
var zipData = zip(data, '');
var makeSpaces = function (num) { return new Array(num + 1).join(' '); };
var formattedCols = zipData.map(function (column) {
var maxLen = getLongest(column).length;//find the maximum word length
if (formatting === 'left') {
return column.map(function (word) { return word + makeSpaces(maxLen - word.length); });
} else if (formatting === 'right') {
return column.map(function (word) { return makeSpaces(maxLen - word.length) + word; });
} else {
return column.map(function (word) {
var spaces = maxLen - word.length,
first = ~~(spaces / 2),
last = spaces - first;
return makeSpaces(first) + word + makeSpaces(last);
});
}
});
return zip(formattedCols).map(function (row) { return row.join(' '); }).join('\n');
};
Or (ES5) using transpose and zipWith:
(function (strText) {
'use strict';
// [[a]] -> [[a]]
function transpose(lst) {
return lst[0].map(function (_, iCol) {
return lst.map(function (row) {
return row[iCol];
})
});
}
// (a -> b -> c) -> [a] -> [b] -> [c]
function zipWith(f, xs, ys) {
return xs.length === ys.length ? (
xs.map(function (x, i) {
return f(x, ys[i]);
})
) : undefined;
}
// (a -> a -> Ordering) -> [a] -> a
function maximumBy(f, xs) {
return xs.reduce(function (a, x) {
return a === undefined ? x : (
f(x) > f(a) ? x : a
);
}, undefined)
}
// [String] -> String
function widest(lst) {
return maximumBy(length, lst)
.length;
}
// [[a]] -> [[a]]
function fullRow(lst, n) {
return lst.concat(Array.apply(null, Array(n - lst.length))
.map(function () {
return ''
}));
}
// String -> Int -> String
function nreps(s, n) {
var o = '';
if (n < 1) return o;
while (n > 1) {
if (n & 1) o += s;
n >>= 1;
s += s;
}
return o + s;
}
// [String] -> String
function unwords(xs) {
return xs.join(' ');
}
// [String] -> String
function unlines(xs) {
return xs.join('\n');
}
// [a] -> Int
function length(xs) {
return xs.length;
}
// -- Int -> [String] -> [[String]]
function padWords(n, lstWords, eAlign) {
return lstWords.map(function (w) {
var lngPad = n - w.length;
return (
(eAlign === eCenter) ? (function () {
var lngHalf = Math.floor(lngPad / 2);
return [
nreps(' ', lngHalf), w,
nreps(' ', lngPad - lngHalf)
];
})() : (eAlign === eLeft) ?
['', w, nreps(' ', lngPad)] :
[nreps(' ', lngPad), w, '']
)
.join('');
});
}
// MAIN
var eLeft = -1,
eCenter = 0,
eRight = 1;
var lstRows = strText.split('\n')
.map(function (x) {
return x.split('$');
}),
lngCols = widest(lstRows),
lstCols = transpose(lstRows.map(function (r) {
return fullRow(r, lngCols)
})),
lstColWidths = lstCols.map(widest);
// THREE PARAGRAPHS, WITH VARIOUS WORD COLUMN ALIGNMENTS:
return [eLeft, eRight, eCenter]
.map(function (eAlign) {
var fPad = function (n, lstWords) {
return padWords(n, lstWords, eAlign);
};
return transpose(
zipWith(fPad, lstColWidths, lstCols)
)
.map(unwords);
})
.map(unlines)
.join('\n\n');
})(
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n\
are$delineated$by$a$single$'dollar'$character,$write$a$program\n\
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n\
column$are$separated$by$at$least$one$space.\n\
Further,$allow$for$each$word$in$a$column$to$be$either$left$\n\
justified,$right$justified,$or$center$justified$within$its$column."
);
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
jq
The key to the following implementation is the filter named "transpose", which is defined to work on a possibly jagged matrix. It is provided as a built-in in jq 1.5 and later.
# transpose a possibly jagged matrix
def transpose:
if . == [] then []
else (.[1:] | transpose) as $t
| .[0] as $row
| reduce range(0; [($t|length), (.[0]|length)] | max) as $i
([]; . + [ [ $row[$i] ] + $t[$i] ])
end;
# left/right/center justification of strings:
def ljust(width): . + " " * (width - length);
def rjust(width): " " * (width - length) + .;
def center(width):
(width - length) as $pad
| if $pad <= 0 then .
else ($pad / 2 | floor) as $half
| $half * " " + . + ($pad-$half) * " "
end ;
# input: a single string, which includes newlines to separate lines, and $ to separate phrases;
# method must be "left" "right" or anything else for central justification.
def format(method):
def justify(width):
if method == "left" then ljust(width)
elif method == "right" then rjust(width)
else center(width)
end;
# max_widths: input: an array of strings, each with "$" as phrase-separator;
# return the appropriate column-wise maximum lengths
def max_widths:
map(split("$") | map(length))
| transpose | map(max) ;
split("\n") as $input
| $input
| (max_widths | map(.+1)) as $widths
| map( split("$") | . as $line | reduce range(0; length) as $i
(""; . + ($line[$i]|justify($widths[$i])) ))
| join("\n")
;
Example:
"Center:", format("center"), "",
"Left:", format("left"), "",
"Right:", format("right")
- Output:
$ jq -M -R -r -s -f Align_columns.jq Align_columns.txt
Center:
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Left:
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Right:
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Jsish
From Javascript ES5 entry.
/* Align columns, in Jsish */
function alignColumns(phrases:array, just:string) {
var x, y, max, diff, left, right, cols=0;
for(x=0; x<phrases.length; x++) {
phrases[x] = phrases[x].split("$");
if (phrases[x].length>cols) cols=phrases[x].length;
}
for (x=0; x<cols; x++) {
max = 0;
for (y=0; y<phrases.length; y++) if (phrases[y][x] && max<phrases[y][x].length) max = phrases[y][x].length;
for (y=0; y<phrases.length; y++) {
if (phrases[y][x]) {
diff = (max-phrases[y][x].length)/2;
left = " ".repeat(Math.floor(diff));
right = " ".repeat(Math.ceil(diff));
if (just == "left") { right += left; left=""; }
if (just == "right") { left += right; right=""; }
phrases[y][x] = left + phrases[y][x] + right;
}
}
}
for (x=0; x<phrases.length; x++) phrases[x] = phrases[x].join(" ");
phrases = phrases.join("\n");
return phrases;
}
if (Interp.conf('unitTest')) {
var phrases = ["Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column."];
for (var just of ['left', 'center', 'right']) {
var trial = phrases.slice(0);
puts(just);
puts(alignColumns(trial, just), '\n');
}
}
- Output:
prompt$ jsish --U alignColumns.jsi left Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. center Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. right Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Julia
txt = """Given\$a\$txt\$file\$of\$many\$lines,\$where\$fields\$within\$a\$line\$
are\$delineated\$by\$a\$single\$'dollar'\$character,\$write\$a\$program
that\$aligns\$each\$column\$of\$fields\$by\$ensuring\$that\$words\$in\$each\$
column\$are\$separated\$by\$at\$least\$one\$space.
Further,\$allow\$for\$each\$word\$in\$a\$column\$to\$be\$either\$left\$
justified,\$right\$justified,\$or\$center\$justified\$within\$its\$column."""
# left/right/center justification of strings:
ljust(s, width) = s * " "^max(0, width - length(s))
rjust(s, width) = " "^max(0, width - length(s)) * s
function center(s, width)
pad = width - length(s)
if pad <= 0
return s
else
pad2 = div(pad, 2)
return " "^pad2 * s * " "^(pad - pad2)
end
end
parts = [split(rstrip(line, '$'), '$') for line in split(txt, '\n')]
max_widths = zeros(Int, maximum(length, parts))
for line in parts
for (i, word) in enumerate(line)
max_widths[i] = max(max_widths[i], length(word))
end
end
max_widths += 1 # separate cols by at least one space
for (label, justify) in (("Left", ljust), ("Right",rjust), ("Center",center))
println(label, " column-aligned output:")
for line in parts
for (j, word) in enumerate(line)
print(justify(word, max_widths[j]))
end
println()
end
println("-"^sum(max_widths))
end
- Output:
Left column-aligned output: Given a txt file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. --------------------------------------------------------------------------------------------------------- Right column-aligned output: Given a txt file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. --------------------------------------------------------------------------------------------------------- Center column-aligned output: Given a txt file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. ---------------------------------------------------------------------------------------------------------
Kotlin
import java.nio.charset.StandardCharsets
import java.nio.file.Files
import java.nio.file.Paths
enum class AlignFunction {
LEFT { override fun invoke(s: String, l: Int) = ("%-" + l + 's').format(("%" + s.length + 's').format(s)) },
RIGHT { override fun invoke(s: String, l: Int) = ("%-" + l + 's').format(("%" + l + 's').format(s)) },
CENTER { override fun invoke(s: String, l: Int) = ("%-" + l + 's').format(("%" + ((l + s.length) / 2) + 's').format(s)) };
abstract operator fun invoke(s: String, l: Int): String
}
/** Aligns fields into columns, separated by "|".
* @constructor Initializes columns aligner from lines in a list of strings.
* @property lines Lines in a single string. Empty string does form a column.
*/
class ColumnAligner(val lines: List<String>) {
operator fun invoke(a: AlignFunction) : String {
var result = ""
for (lineWords in words) {
for (i in lineWords.indices) {
if (i == 0)
result += '|'
result += a(lineWords[i], column_widths[i])
result += '|'
}
result += '\n'
}
return result
}
private val words = arrayListOf<Array<String>>()
private val column_widths = arrayListOf<Int>()
init {
lines.forEach {
val lineWords = java.lang.String(it).split("\\$")
words += lineWords
for (i in lineWords.indices) {
if (i >= column_widths.size) {
column_widths += lineWords[i].length
} else {
column_widths[i] = Math.max(column_widths[i], lineWords[i].length)
}
}
}
}
}
fun main(args: Array<String>) {
if (args.isEmpty()) {
println("Usage: ColumnAligner file [L|R|C]")
return
}
val ca = ColumnAligner(Files.readAllLines(Paths.get(args[0]), StandardCharsets.UTF_8))
val alignment = if (args.size >= 2) args[1] else "L"
when (alignment) {
"L" -> print(ca(AlignFunction.LEFT))
"R" -> print(ca(AlignFunction.RIGHT))
"C" -> print(ca(AlignFunction.CENTER))
else -> System.err.println("Error! Unknown alignment: " + alignment)
}
}
Lambdatalk
The input data is a sequence of characters where words are supposed to be separated by $ and lines be ended by \$. A HTML table is used to format the output left, centered or right justified.
{def txt
Given$a$text$file$of$many$lines,$where$fields$within$a$line\$are$delineated$by$a$single$'dollar'$character,$write$a$program\$that$aligns$each$column$of$fields$by$ensuring$that$words$in$each\$column$are$separated$by$at$least$one$space.\$Further,$allow$for$each$word$in$a$column$to$be$either$left\$justified,$right$justified,$or$center$justified$within$its$column.}
-> txt
{def columns // function's name
{def columns.r // loop function
{lambda {:just :a :b}
{if {A.empty? :a} // end of loop
then :b // return the string
else {columns.r :just // justification
{A.rest :a}. // loop on next char
{if {W.equal? {A.first :a} \} // if end of line
then < tr> :b // open a table row
else {if {W.equal? {A.first :a} $} // if space between words
then < td style="text-align::just;">:b // open a table data with justif
else {A.first :a}:b }} } }}} // else add character
{lambda {:just :txt} // main function
{table // open an HTML table
{columns.r // call the loop function
:just // justification
{A.reverse {A.split ${:txt}}} // split and reverse
. // end point
}}}}
-> columns
{columns left txt}
-> Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column..
{columns center txt} and {columns right txt} outputs can be seen in this website: http://lambdaway.free.fr/lambdawalks/?view=align_columns
Lasso
#!/usr/bin/lasso9
local(text = "Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
")
define go_left(text::array, width::integer) => {
local(output = string)
with row in #text do {
with word in #row do {
#output -> append(string(#word) -> padtrailing(#width + 1)&)
}
#output -> append('\n')
}
return #output
}
define go_right(text::array, width::integer) => {
local(output = string)
with row in #text do {
with word in #row do {
#output -> append(string(#word) -> padleading(#width + 1)&)
}
#output -> append('\n')
}
return #output
}
define go_center(text::array, width::integer) => {
local(output = string)
with row in #text do {
with word in #row do {
local(
padlength = (#width + 1 - #word -> size),
padleft = (' ' * (#padlength / 2)),
padright = (' ' * (#padlength - #padleft -> size))
)
#output -> append(#padleft + string(#word) + #padright)
}
#output -> append('\n')
}
return #output
}
define prepcols(text::string) => {
local(
result = array,
maxwidth = 0
)
with row in #text -> split('\n') do {
#row -> removetrailing('$')
#result -> insert(#row -> split('$'))
}
with word in delve(#result) do {
#word -> size > #maxwidth ? #maxwidth = #word -> size
}
stdoutnl('Left aligned result: \n' + go_left(#result, #maxwidth))
stdoutnl('Right aligned result: \n' + go_right(#result, #maxwidth))
stdoutnl('Centered result: \n' + go_center(#result, #maxwidth))
}
prepcols(#text)
- Output:
Left aligned result: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Right aligned result: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Centered result: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Liberty BASIC
mainwin 140 32
CRLF$ =chr$( 13)
maxlen =0
read y
Dim txt$( y)
For i =1 To y
Read i$
print i$
if right$( i$, 1) <>"$" then i$ =i$ +"$"
txt$( i) =i$
x =max( CountDollars( txt$( i)), x)
Next i
print x
Dim matrix$( x, y)
Print CRLF$; " ---- Left ----"
For yy =1 To y
For xx =1 To x
matrix$( xx, yy) =word$( txt$( yy), xx, "$")
print matrix$( xx, yy), "|";
maxlen =max( maxlen, Len( matrix$( xx, yy)))
Next xx
print ""
Next yy
Print CRLF$; " ---- Right ----"
For yy =1 To y
For xx =1 To x
Print right$( " " +matrix$( xx, yy), maxlen +1); "|";
' will truncate column words longer than 20. Change to use maxlen....
Next xx
Print ""
Next yy
Print CRLF$ +" ---- Center ----"
For yy =1 to y
For xx =1 to x
wordLen =Len( matrix$( xx, yy))
padNeeded =maxlen -wordLen +4
LeftSpaces =padNeeded /2
if LeftSpaces =int( LeftSpaces) then
RightSpaces =LeftSpaces
else
RightSpaces =LeftSpaces -1
end if
Print space$( LeftSpaces); matrix$( xx, yy); space$( RightSpaces); "|";
Next xx
Print ""
Next yy
wait
Data 6
Data "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
Data "are$delineated$by$a$single$'dollar'$character,$write$a$program"
Data "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
Data "column$are$separated$by$at$least$one$space."
Data "Further,$allow$for$each$word$in$a$column$to$be$either$left$"
Data "justified,$right$justified,$or$center$justified$within$its$column."
function CountDollars( src$)
c =0
for j =1 to len( src$)
if mid$( src$, j, 1) ="$" then c =c +1
next j
CountDollars =c
end function
end
Lua
local tWord = {} -- word table
local tColLen = {} -- maximum word length in a column
local rowCount = 0 -- row counter
--store maximum column lengths at 'tColLen'; save words into 'tWord' table
local function readInput(pStr)
for line in pStr:gmatch("([^\n]+)[\n]-") do -- read until '\n' character
rowCount = rowCount + 1
tWord[rowCount] = {} -- create new row
local colCount = 0
for word in line:gmatch("[^$]+") do -- read non '$' character
colCount = colCount + 1
tColLen[colCount] = math.max((tColLen[colCount] or 0), #word) -- store column length
tWord[rowCount][colCount] = word -- store words
end--for word
end--for line
end--readInput
--repeat space to align the words in the same column
local align = {
["left"] = function (pWord, pColLen)
local n = (pColLen or 0) - #pWord + 1
return pWord .. (" "):rep(n)
end;--["left"]
["right"] = function (pWord, pColLen)
local n = (pColLen or 0) - #pWord + 1
return (" "):rep(n) .. pWord
end;--["right"]
["center"] = function (pWord, pColLen)
local n = (pColLen or 0) - #pWord + 1
local n1 = math.floor(n/2)
return (" "):rep(n1) .. pWord .. (" "):rep(n-n1)
end;--["center"]
}
--word table padder
local function padWordTable(pAlignment)
local alignFunc = align[pAlignment] -- selecting the spacer function
for rowCount, tRow in ipairs(tWord) do
for colCount, word in ipairs(tRow) do
tRow[colCount] = alignFunc(word, tColLen[colCount]) -- save the padded words into the word table
end--for colCount, word
end--for rowCount, tRow
end--padWordTable
--main interface
--------------------------------------------------[]
function alignColumn(pStr, pAlignment, pFileName)
--------------------------------------------------[]
readInput(pStr) -- store column lengths and words
padWordTable(pAlignment or "left") -- pad the stored words
local output = ""
for rowCount, tRow in ipairs(tWord) do
local line = table.concat(tRow) -- concatenate words in one row
print(line) -- print the line
output = output .. line .. "\n" -- concatenate the line for output, add line break
end--for rowCount, tRow
if (type(pFileName) == "string") then
local file = io.open(pFileName, "w+")
file:write(output) -- write output to file
file:close()
end--if type(pFileName)
return output
end--alignColumn
Usage Example:
input =
[[Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.]]
outputLeft = alignColumn(input)
outputRight = alignColumn(input, "right")
alignColumn(input, "center", "output.txt")
M2000 Interpreter
Module Align_Columns {
a$={Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
}
const cr$=chr$(13), lf$=chr$(10)
def c1=0, cmax=0, p1=-1, i
flush ' empty stack
for i=1 to len(a$)
select case mid$(a$,i,1)
case "$", cr$
if p1<>-1 then data (p1, c1): p1=-1: cmax=max(c1,cmax):c1=0
case lf$
data (-1,0) ' push to end of stack an array of two items (a tuple in m2000)
else case
if p1=-1 then p1=i :c1=1 else c1++
end select
next
if p1<>-1 then push (p1, c1): cmax=max(c1,cmax):c1=0
\\ so now stack of values hold all tuples.
Dim Words(), AlignType$(1 to 3)
AlignType$(1)=lambda$ (a$,wd)->field$(a$, wd)
AlignType$(2)=lambda$ (a$,wd)->{
a$=left$(a$, wd)
=left$(string$(" ", (len(a$)-wd) div 2)+a$+string$(" ",wd),wd)
}
AlignType$(3)= lambda$ (a$,wd)->format$("{0:"+str$(-wd)+"}", a$)
\\ [] return a stack object, reference and leave current stack of values a new stack
\\ Array( stack_object) empty the stack object moving items to an array
Words()=Array([])
document export$
def aline$
cmax++ ' add one space
For al=1 to 3
For i=0 to len(Words())-1
if Words(i)(0)=-1 then
' we use rtrim$() to cut trailing spaces
export$=rtrim$(aline$)+cr$+lf$ : aline$=""
else
aline$+=AlignType$(al)(mid$(a$,Words(i)(0), Words(i)(1)),cmax)
end if
next i
next
\\ export to clipboard
Clipboard export$
Rem Form 140, 60
Rem Print #-2, export$ ' render text to console without using console's columns
}
Align_Columns
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Maple
Assign the sample data.
txt :=
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$\n"
"are$delineated$by$a$single$'dollar'$character,$write$a$program\n"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$\n"
"column$are$separated$by$at$least$one$space.\n"
"Further,$allow$for$each$word$in$a$column$to$be$either$left$\n"
"justified,$right$justified,$or$center$justified$within$its$column.\n":
The following procedure solves the problem. It takes the string to be operated on as input, and an optional alignment parameter, which defaults to centred alignment. The aligned text is returned, as a string, which can then be printed.
AlignColumns := proc( txt, align :: { "left", "right", "centre" } := "centre" )
uses StringTools;
# Get a list of lists of fields
local A := map( Split, Split( txt ), "$" );
# Calculate the column width
local width := 1 + max( map( L -> max( map( length, L ) ), A ) );
# Add spacing according to the requested type of alignment
if align = "left" then
local J := map( line -> map( PadRight, line, width ), A )
elif align = "right" then
J := map( line -> map( PadLeft, line, width ), A )
else
J := map( line -> map( Center, line, width ), A )
end if;
# Join up the fields in each line.
J := map( cat@op, J );
# Re-assemble the lines into a single string.
Join( J, "\n" )
end proc:
For the sample text, we get the following results.
> printf( "%s\n", AlignColumns( txt ) ):
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
> printf( "%s\n", AlignColumns( txt, "center" ) ): # same as above
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
> printf( "%s\n", AlignColumns( txt, "left" ) ):
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
> printf( "%s\n", AlignColumns( txt, "right" ) ):
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Alternatively, this could be printed to a file (using fprintf instead of printf).
Mathematica / Wolfram Language
TableForm[StringSplit[StringSplit[a,"\n"],"$"],TableAlignments -> Center]
MATLAB / Octave
center-justified formatting is not implemented here
function r = align_columns(f)
fid = fopen('align_column_data.txt', 'r');
D = {};
M = 0;
while ~feof(fid)
s = fgetl(fid);
strsplit(s,'$');
m = diff([0,find(s=='$')])-1;
M = max([M,zeros(1,length(m)-length(M))], [m,zeros(1,length(M)-length(m))]);
D{end+1}=s;
end
fclose(fid);
fprintf(1,'%%-- right-justified --%%\n')
FMT = sprintf('%%%ds ',M);
for k=1:length(D)
d = strsplit(D{k},'$');
fprintf(1,FMT,d{:});
fprintf(1,'\n');
end
fprintf(1,'%%-- left-justified --%%\n')
FMT = sprintf('%%-%ds ',M);
for k=1:length(D)
d = strsplit(D{k},'$');
fprintf(1,FMT,d{:});
fprintf(1,'\n');
end
end;
- Output:
align_columns %-- right-justified --% Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. %-- left-justified --% Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
MiniScript
Alignment = {"left": -1, "center": 0, "right": 1}
Align = {}
Align.load = function(contents)
self.lines = contents.split(char(13))
self.rows = []
self.numColumns = 0
for line in self.lines
columns = line.split("$")
if columns.len > self.numColumns then self.numColumns = columns.len
self.rows.push(columns)
end for
self.widths = []
for col in range(0, self.numColumns - 1)
maxWidth = 0
for line in self.rows
if col > line.len - 1 then continue
if line[col].len > maxWidth then maxWidth = line[col].len
end for
self.widths.push(maxWidth)
end for
end function
Align.__getField = function(word, width, alignment)
if alignment == Alignment.left then return (word + " " * width)[:width]
if alignment == Alignment.right then return (" " * width+word)[-width:]
if alignment == Alignment.center then
leftMargin = floor((width - word.len) / 2)
return (" " * leftMargin + word + " " * width)[:width]
end if
end function
Align.output = function(alignment)
for line in self.rows
for c in range(0, line.len - 1)
print self.__getField(line[c], self.widths[c], alignment) + " ", ""
end for
print
end for
end function
txt = "Given$a$text$file$of$many$lines,$where$fields$within$a$line$" + char(13)
txt += "are$delineated$by$a$single$'dollar'$character,$write$a$program" + char(13)
txt += "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$" + char(13)
txt += "column$are$separated$by$at$least$one$space." + char(13)
txt += "Further,$allow$for$each$word$in$a$column$to$be$either$left$" + char(13)
txt += "justified,$right$justified,$or$center$justified$within$its$column."
Align.load(txt)
print "Left alignment:"
Align.output(Alignment.left)
print
print "Right alignment:"
Align.output(Alignment.right)
print
print "Centered: "
Align.output(Alignment.center)
- Output:
>miniscript.exe align-columns.ms Left alignment: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Right alignment: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Centered: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
ML/I
In this example, ML/I reads its macros first, then switches input to the file containing the data to be formatted. Output is to 'standard output' or similar. Note the presetting of P102 to indicate the alignment required.
MCSKIP "WITH" NL
"" Align columns - assumes macros on input stream 1, data on stream 2
MCPVAR 102
"" Set P102 to alignment required:
"" 1 = centre
"" 2 = left
"" 3 = right
MCSET P102 = 1
MCSKIP MT,<>
MCINS %.
MCSKIP SL WITH *
"" Assume no more than 100 columns - P101 used for max number of fields
"" Set P variables 1-101 to 0
MCDEF ZEROPS WITHS NL AS <MCSET T1=1
%L1.MCSET PT1=0
MCSET T1=T1+1
MCGO L1 UNLESS T1 EN 102
>
ZEROPS
"" First pass - macro to accumulate max columns, and max widths
MCDEF SL N1 OPT $ N1 OR $ WITHS NL OR SPACE WITHS NL OR NL ALL
AS <MCGO L3 UNLESS T1 GR P101
MCSET P101=T1
%L3.MCSET T2=1
%L1.MCGO L0 IF T2 GR T1
MCSET T3=MCLENG(%WBT2.)
MCGO L2 UNLESS T3 GR PT2
MCSET PT2=T3
%L2.MCSET T2=T2+1
MCGO L1
>
MCSET S1=1
*MCSET S10=2
*MCSET S1=0
MCSET S4=1
""MCNOTE Max field is %P101.
""MCDEF REP NL AS <MCSET T1=1
""%L1.%PT1. MCSET T1=T1+1
""MCGO L1 UNLESS T1 GR P101
"">
""REP
MCDEF SL N1 OPT $ N1 OR $ WITHS NL OR SPACE WITHS NL OR NL ALL
AS <MCSET T2=1
%L5.MCGO L6 IF T2 GR T1
MCGO LP102
%L1.MCSET T3=%%%PT2.-MCLENG(%WBT2.)./2.
MCGO L7 IF T3 EN 0
MCSUB(< >,1,T3)%L7.%WBT2.""
MCSUB(< >,1,PT2-T3-MCLENG(%WBT2.)+1)MCGO L4
%L2.MCSUB(%WBT2.< >,1,PT2)MCGO L4
%L3.MCSUB(< >%WBT2.,1-PT2,0)""
%L4. MCSET T2=T2+1
MCGO L5
%L6.
>
MCSET S1=1
*MCSET S10=102
ML/I
In this example, ML/I reads its macros first, then switches input to the file containing the data to be formatted. Output is to 'standard output' or similar. Note the presetting of P102 to indicate the alignment required.
MCSKIP "WITH" NL
"" Align columns - assumes macros on input stream 1, data on stream 2
MCPVAR 102
"" Set P102 to alignment required:
"" 1 = centre
"" 2 = left
"" 3 = right
MCSET P102 = 1
MCSKIP MT,<>
MCINS %.
MCSKIP SL WITH *
"" Assume no more than 100 columns - P101 used for max number of fields
"" Set P variables 1-101 to 0
MCDEF ZEROPS WITHS NL AS <MCSET T1=1
%L1.MCSET PT1=0
MCSET T1=T1+1
MCGO L1 UNLESS T1 EN 102
>
ZEROPS
"" First pass - macro to accumulate max columns, and max widths
MCDEF SL N1 OPT $ N1 OR $ WITHS NL OR SPACE WITHS NL OR NL ALL
AS <MCGO L3 UNLESS T1 GR P101
MCSET P101=T1
%L3.MCSET T2=1
%L1.MCGO L0 IF T2 GR T1
MCSET T3=MCLENG(%WBT2.)
MCGO L2 UNLESS T3 GR PT2
MCSET PT2=T3
%L2.MCSET T2=T2+1
MCGO L1
>
MCSET S1=1
*MCSET S10=2
*MCSET S1=0
MCSET S4=1
""MCNOTE Max field is %P101.
""MCDEF REP NL AS <MCSET T1=1
""%L1.%PT1. MCSET T1=T1+1
""MCGO L1 UNLESS T1 GR P101
"">
""REP
MCDEF SL N1 OPT $ N1 OR $ WITHS NL OR SPACE WITHS NL OR NL ALL
AS <MCSET T2=1
%L5.MCGO L6 IF T2 GR T1
MCGO LP102
%L1.MCSET T3=%%%PT2.-MCLENG(%WBT2.)./2.
MCGO L7 IF T3 EN 0
MCSUB(< >,1,T3)%L7.%WBT2.""
MCSUB(< >,1,PT2-T3-MCLENG(%WBT2.)+1)MCGO L4
%L2.MCSUB(%WBT2.< >,1,PT2)MCGO L4
%L3.MCSUB(< >%WBT2.,1-PT2,0)""
%L4. MCSET T2=T2+1
MCGO L5
%L6.
>
MCSET S1=1
*MCSET S10=102
MUMPS
columns(how) ; how = "Left", "Center" or "Right"
New col,half,ii,max,spaces,word
Set ii=0
Set ii=ii+1,line(ii)="Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
Set ii=ii+1,line(ii)="are$delineated$by$a$single$'dollar'$character,$write$a$program"
Set ii=ii+1,line(ii)="that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
Set ii=ii+1,line(ii)="column$are$separated$by$at$least$one$space."
Set ii=ii+1,line(ii)="Further,$allow$for$each$word$in$a$column$to$be$either$left$"
Set ii=ii+1,line(ii)="justified,$right$justified,$or$center$justified$within$its$column."
Set ii="" For Set ii=$Order(line(ii)) Quit:ii="" Do
. For col=1:1:$Length(line(ii),"$") Do
. . Set max=$Length($Piece(line(ii),"$",col))
. . Set:max>$Get(max(col)) max(col)=max
. . Quit
. Quit
Set ii="" For Set ii=$Order(line(ii)) Quit:ii="" Do
. Write ! For col=1:1:$Length(line(ii),"$") Do:$Get(max(col))
. . Set word=$Piece(line(ii),"$",col)
. . Set spaces=$Justify("",max(col)-$Length(word))
. . If how="Left" Write word,spaces," " Quit
. . If how="Right" Write spaces,word," " Quit
. . Set half=$Length(spaces)\2
. . Write $Extract(spaces,1,half),word,$Extract(spaces,half+1,$Length(spaces))," "
. . Quit
. Quit
Write !
Quit
Do columns("Left")
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Do columns("Center")
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Do columns("Right")
Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column.
Nim
from strutils import splitLines, split
from sequtils import mapIt
from strfmt import format, write
let textinfile = """Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."""
var words = textinfile.splitLines.mapIt(it.split '$')
var maxs = newSeq[int](max words.mapIt(it.len))
for line in words:
for j,w in line:
maxs[j] = max(maxs[j], w.len+1)
for i, align in ["<",">","^"]:
echo(["Left", "Right", "Center"][i], " column-aligned output:")
for line in words:
for j,w in line:
stdout.write(w.format align & $maxs[j])
stdout.write "\n"
stdout.write "\n"
- Output:
Left column-aligned output: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Right column-aligned output: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Center column-aligned output: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Nit
Source: the official Nit’s repository
# Task: Align columns
#
# Uses `Text::justify` from the standard library.
module align_columns
fun aligner(text: String, left: Float)
do
# Each row is a sequence of fields
var rows = new Array[Array[String]]
for line in text.split('\n') do
rows.add line.split("$")
end
# Compute the final length of each column
var lengths = new Array[Int]
for fields in rows do
var i = 0
for field in fields do
var fl = field.length
if lengths.length <= i or fl > lengths[i] then
lengths[i] = fl
end
i += 1
end
end
# Process each line and align each field
for fields in rows do
var line = new Array[String]
var i = 0
for field in fields do
line.add field.justify(lengths[i], left)
i += 1
end
print line.join(" ")
end
end
var text = """
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."""
aligner(text, 0.0)
aligner(text, 1.0)
aligner(text, 0.5)
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Oberon-2
works with oo2c version 2.
MODULE Columns;
IMPORT
NPCT:Tools,
Object,
Out;
TYPE
Parts = ARRAY 32 OF STRING;
Formatter = PROCEDURE (s: STRING; len: LONGINT): STRING;
VAR
lines: ARRAY 6 OF STRING;
words: ARRAY 6 OF Parts;
columnWidth: ARRAY 128 OF INTEGER;
lineIdx: INTEGER;
(*
* Size: returns de number of words in a line
*)
PROCEDURE Size(p: Parts): INTEGER;
VAR
i: INTEGER;
BEGIN
i := 0;
WHILE (i < LEN(p)) & (p[i] # NIL) DO
INC(i);
END;
RETURN i
END Size;
(*
* Max: returns maximum number of words in the lines
*)
PROCEDURE Max(w: ARRAY OF Parts): INTEGER;
VAR
i, max, resp: INTEGER;
BEGIN
i := 0;resp := 0;
WHILE (i < LEN(w)) DO
max := Size(w[i]);
IF (max > resp) THEN resp := max END;
INC(i)
END;
RETURN resp;
END Max;
(*
* MaxColumnWidth: returns the maximum width of a column
*)
PROCEDURE MaxColumnWidth(w: ARRAY OF Parts;column: INTEGER): INTEGER;
VAR
line,max: LONGINT;
BEGIN
line := 0;
max := MIN(INTEGER);
WHILE (line < LEN(w)) DO;
IF (w[line,column] # NIL) & (w[line,column](Object.String8).length > max) THEN max := w[line,column](Object.String8).length END;
INC(line)
END;
RETURN SHORT(max)
END MaxColumnWidth;
(*
* PrintWords: prints the words in 'w' using the formatter passed in 'format'
*)
PROCEDURE PrintWords(w: ARRAY OF Parts; format: Formatter);
VAR
i,j: INTEGER;
BEGIN
i := 0;
WHILE (i < LEN(words)) DO
j := 0;
WHILE (j < Max(words)) & (words[i,j] # NIL) DO
Out.Object(format(words[i,j],columnWidth[j] + 1));
INC(j)
END;
Out.Ln;
INC(i)
END;
Out.Ln
END PrintWords;
BEGIN
lines[0] := "Given$a$text$file$of$many$lines,$where$fields$within$a$line$";
lines[1] := "are$delineated$by$a$single$'dollar'$character,$write$a$program";
lines[2] := "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$";
lines[3] := "column$are$separated$by$at$least$one$space.";
lines[4] := "Further,$allow$for$each$word$in$a$column$to$be$either$left$";
lines[5] := "justified,$right$justified,$or$center$justified$within$its$column.";
(* Split line in words *)
lineIdx := 0;
WHILE lineIdx < LEN(lines) DO
Tools.Split(lines[lineIdx],"$",words[lineIdx]);
INC(lineIdx)
END;
(* Calculate width of the column *)
lineIdx := 0;
WHILE (lineIdx < Max(words)) DO
columnWidth[lineIdx] := MaxColumnWidth(words,lineIdx);
INC(lineIdx)
END;
(* Print Results *)
PrintWords(words,Tools.AdjustLeft);
PrintWords(words,Tools.AdjustCenter);
PrintWords(words,Tools.AdjustRight);
END Columns.
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
OCaml
#load "str.cma"
open Str
let input = "\
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column."
let () =
let lines = split (regexp_string "\n") input in
let fields_l = List.map (split (regexp_string "$")) lines in
let fields_l = List.map Array.of_list fields_l in
let n = (* number of columns *)
List.fold_left
(fun n fields -> max n (Array.length fields))
0 fields_l
in
let pads = Array.make n 0 in
List.iter (
(* calculate the max padding for each column *)
Array.iteri
(fun i word -> pads.(i) <- max pads.(i) (String.length word))
) fields_l;
let print f =
List.iter (fun fields ->
Array.iteri (fun i word ->
f word (pads.(i) - (String.length word))
) fields;
print_newline()
) fields_l;
in
(* left column-aligned output *)
print (fun word pad ->
let spaces = String.make pad ' ' in
Printf.printf "%s%s " word spaces);
(* right column-aligned output *)
print (fun word pad ->
let spaces = String.make pad ' ' in
Printf.printf "%s%s " spaces word);
(* center column-aligned output *)
print (fun word pad ->
let pad1 = pad / 2 in
let pad2 = pad - pad1 in
let sp1 = String.make pad1 ' ' in
let sp2 = String.make pad2 ' ' in
Printf.printf "%s%s%s " sp1 word sp2);
;;
Oforth
import: mapping
import: file
: <<nbl \ stream n -- stream
#[ ' ' <<c ] times ;
String method: justify( n just -- s )
| l m |
n self size - dup ->l 2 / ->m
String new
just $RIGHT if=: [ l <<nbl self << return ]
just $LEFT if=: [ self << l <<nbl return ]
m <<nbl self << l m - <<nbl
;
: align( file just -- )
| lines maxsize |
#[ wordsWith( '$' ) ] file File new map ->lines
0 #[ apply( #[ size max ] ) ] lines apply ->maxsize
#[ apply( #[ justify( maxsize , just) . ] ) printcr ] lines apply
;
- Output:
>"align.txt" $LEFT align Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. ok >
ooRexx
text = .array~of("Given$a$text$file$of$many$lines,$where$fields$within$a$line$", -
"are$delineated$by$a$single$'dollar'$character,$write$a$program", -
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$", -
"column$are$separated$by$at$least$one$space.", -
"Further,$allow$for$each$word$in$a$column$to$be$either$left$", -
"justified,$right$justified,$or$center$justified$within$its$column.")
columns = 0
parsedText = .array~new
-- split each line of text into words and figure out how many columns we need
loop line over text
parsedLine = line~makearray("$")
parsedText~append(parsedLine)
columns = max(columns, parsedLine~items)
end
-- now figure out how wide we need to make each column
columnWidths = .array~new(columns)
linelength = 0
loop i = 1 to columns
width = 0
loop line over parsedText
word = line[i]
if word \= .nil then width = max(width, word~length)
end
columnWidths[i] = width
-- keep track of the total width, including space for a separator
linelength += width + 1
end
say "align left:"
say
out = .mutableBuffer~new(linelength)
loop line over parsedText
-- mutable buffers are more efficient than repeated string concats
-- reset the working buffer to zero
out~setbuffersize(0)
loop col = 1 to line~items
word = line[col]
if word == .nil then word = ''
out~append(word~left(columnwidths[col] + 1))
end
say out~string
end
say
say "align right:"
say
loop line over parsedText
-- mutable buffers are more efficient than repeated string concats
-- reset the working buffer to zero
out~setbuffersize(0)
loop col = 1 to line~items
word = line[col]
if word == .nil then word = ''
out~append(word~right(columnwidths[col] + 1))
end
say out~string
end
say
say "align center:"
say
loop line over parsedText
-- mutable buffers are more efficient than repeated string concats
-- reset the working buffer to zero
out~setbuffersize(0)
loop col = 1 to line~items
word = line[col]
if word == .nil then word = ''
out~append(word~center(columnwidths[col] + 1))
end
say out~string
end
align left: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. align right: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. align center: Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
OpenEdge/Progress
FUNCTION alignColumns RETURNS CHAR (
i_c AS CHAR,
i_calign AS CHAR
):
DEF VAR ipass AS INT.
DEF VAR iline AS INT.
DEF VAR icol AS INT.
DEF VAR iwidth AS INT EXTENT.
DEF VAR cword AS CHAR.
DEF VAR cspace AS CHAR.
DEF VAR cresult AS CHAR.
EXTENT( iwidth ) = NUM-ENTRIES( ENTRY( 1, i_c, "~n" ), "$" ).
DO ipass = 0 TO 1:
DO iline = 1 TO NUM-ENTRIES( i_c, "~n" ):
DO icol = 1 TO NUM-ENTRIES( ENTRY( iline, i_c, "~n" ), "$" ):
cword = ENTRY( icol, ENTRY( iline, i_c, "~n" ), "$" ).
IF ipass = 0 THEN
iwidth = MAXIMUM( LENGTH( cword ), iwidth[ icol ] ).
ELSE DO:
cspace = FILL( " ", iwidth[ icol ] - LENGTH( cword ) ).
CASE i_calign:
WHEN "left" THEN cresult = cresult + cword + cspace.
WHEN "right" THEN cresult = cresult + cspace + cword.
WHEN "center" THEN DO:
cword = FILL( " ", INTEGER( LENGTH( cspace ) / 2 ) ) + cword.
cresult = cresult + cword + FILL( " ", iwidth[icol] - LENGTH( cword ) ).
END.
END CASE. /* i_calign */
cresult = cresult + " ".
END.
END. /* DO icol = 1 TO ... */
IF ipass = 1 THEN
cresult = cresult + "~n".
END. /* DO iline = 1 TO ... */
END. /* DO ipass = 0 TO 1 */
RETURN cresult.
END FUNCTION.
DEF VAR cc AS CHAR.
cc = SUBSTITUTE(
"&1~n&2~n&3~n&4~n&5~n&6",
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column."
).
MESSAGE
alignColumns( cc, "left" ) SKIP
alignColumns( cc, "right" ) SKIP
alignColumns( cc, "center" )
VIEW-AS ALERT-BOX.
- Output:
--------------------------- Message --------------------------- Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. --------------------------- OK ---------------------------
OxygenBasic
'================ Class AlignedText '================ indexbase 1 string buf, bufo, cr, tab, jus sys Cols, Rows, ColWidth[200], TotWidth, ColPad method SetText(string s) cr=chr(13)+chr(10) tab=chr(9) jus=string 200,"L" buf=s measure end method method measure() sys a, b, wa, wb, cm, c, cw a=1 : b=1 Cols=0 : Rows=0 : ColPad=3 do wb=b a=instr b,buf,cr if a=0 then exit do cm=0 c++ do wa=instr wb,buf,"$" if wa=0 or wa>a then exit do cm++ if cm>cols then cols=cm cw=wa-wb if cw > ColWidth[cm] then ColWidth[cm]=cw wb=wa+1 end do b=a+len cr end do rows=c ' c=0 for i=1 to cols ColWidth[ i ]+=ColPad c+=ColWidth[ i ] next TotWidth=c+len cr 'print ShowMetrics end method method ShowMetrics() as string pr="METRICS:" cr cr pr+=rows tab cols tab totwidth cr cr pr+="column" tab "spacing" cr for i=1 to cols pr+=i tab ColWidth[ i ] cr next return pr end method method justify(string j) mid jus,1,j end method method layout() as string sys a, b, wa, wb, wl, cm, lpos, cpos bufo=space Rows*TotWidth a=1 : b=1 do wb=b a=instr(b,buf,cr) if a=0 then exit do cm=0 cpos=1 do wa=instr(wb,buf,"$") if wa=0 or wa>a then exit do ' cm++ ' 'JUSTIFICATION ' wl=wa-wb p=lpos+cpos 'default "L" LEFT ALIGN ' select case asc(jus,cm) case "R" : p=lpos+cpos+ColWidth[cm]-wl-Colpad case "C" : p=lpos+cpos+( ColWidth[cm]-wl-Colpad )*.5 end select ' mid bufo,p, mid buf,wb,wl cpos+=colwidth[cm] wb=wa+1 end do b=a+len cr lpos+=TotWidth if lpos<len(bufo) then mid bufo,lpos-1,cr end do return bufo end method end class '#recordof AlignedText '==== 'TEST '==== AlignedText tt tt.SetText quote """ Given$a$text$file$of$many$lines,$where$fields$within$a$line$ are$delineated$by$a$single$'dollar'$character,$write$a$program that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$ column$are$separated$by$at$least$one$space. Further,$allow$for$each$word$in$a$column$to$be$either$left$ justified,$right$justified,$or$center$justified$within$its$column. """ 'print tt.ShowMetrics tt.justify "LLLLCCCRRRRR" putfile "t.txt", tt.layout
Oz
declare
%% Lines: list of strings
%% Alignment: function like fun {Left Txt ExtraSpace} ... end
%% Returns: list of aligned (virtual) strings
fun {Align Lines Alignment}
ParsedLines = {Map Lines ParseLine}
NumColumns = {Maximum {Map ParsedLines Record.width}}
%% maps column index to column width:
WidthOfColumn = {Record.map {TupleRange NumColumns}
fun {$ ColumnIndex}
fun {LengthOfThisColumn ParsedLine}
{Length {CondSelect ParsedLine ColumnIndex nil}}
end
in
{Maximum {Map ParsedLines LengthOfThisColumn}}
end}
in
{Map ParsedLines
fun {$ Columns}
{Record.mapInd Columns
fun {$ ColumnIndex ColumnText}
Extra = WidthOfColumn.ColumnIndex - {Length ColumnText}
in
{Alignment ColumnText Extra}#" "
end}
end}
end
%% A parsed line is a tuple of columns.
%% "a$b$c" -> '#'(1:"a" 2:"b" 3:"c")
fun {ParseLine Line}
{List.toTuple '#' {String.tokens Line &$}}
end
%% possible alignments:
fun {Left Txt Extra}
Txt#{Spaces Extra}
end
fun {Right Txt Extra}
{Spaces Extra}#Txt
end
fun {Center Txt Extra}
Half = Extra div 2
in
{Spaces Half}#Txt#{Spaces Half + Extra mod 2}
end
%% helpers:
%% 3 -> unit(1 2 3)
fun {TupleRange Max}
{List.toTuple unit {List.number 1 Max 1}}
end
fun {Maximum X|Xr}
{FoldL Xr Value.max X}
end
fun {Spaces N}
case N of 0 then nil
else & |{Spaces N-1}
end
end
Lines = ["Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
"are$delineated$by$a$single$'dollar'$character,$write$a$program"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
"column$are$separated$by$at$least$one$space."
"Further,$allow$for$each$word$in$a$column$to$be$either$left$"
"justified,$right$justified,$or$center$justified$within$its$column."]
in
{ForAll {Align Lines Left} System.showInfo}
Pascal
See Delphi
modified to
program Project1;
{$H+}//Use ansistrings
uses
Classes,
SysUtils,
StrUtils;
procedure AlignByColumn(Align: TAlignment);
const
TextToAlign =
'Given$a$text$file$of$many$lines,$where$fields$within$a$line$'#$D#$A +
'are$delineated$by$a$single$''dollar''$character,$write$a$program'#$D#$A +
'that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$'#$D#$A +
'column$are$separated$by$at$least$one$space.'#$D#$A +
'Further,$allow$for$each$word$in$a$column$to$be$either$left$'#$D#$A +
'justified,$right$justified,$or$center$justified$within$its$column.';
var
TextLine: TStringList;
TextLines: array of TStringList;
OutPutString, EmptyString, Item: string;
MaxLength, i, j: Int32;
begin
try
MaxLength := 0;
TextLine := TStringList.Create;
TextLine.Text := TextToAlign;
setlength(Textlines, TextLine.Count);
for i := 0 to TextLine.Count - 1 do
begin
Textlines[i] := TStringList.Create;
Textlines[i].Text := AnsiReplaceStr(TextLine[i], '$', #$D#$A);
end;
for i := 0 to High(TextLines) do
for j := 0 to Textlines[i].Count - 1 do
if MaxLength < Length(TextLines[i][j]) then
MaxLength := Length(TextLines[i][j]);
if MaxLength > 0 then
MaxLength := MaxLength + 2; // Add two empty spaces to it
for i := 0 to High(TextLines) do
begin
OutPutString := '';
for j := 0 to Textlines[i].Count - 1 do
begin
EmptyString := StringOfChar(' ', MaxLength);
if j <> 0 then
EmptyString[1] := '|';
Item := TextLines[i][j];
case Align of
taLeftJustify: Move(Item[1], EmptyString[2], Length(Item));
taRightJustify: Move(Item[1], EmptyString[MaxLength - Length(Item) + 1],
Length(Item));
taCenter: Move(Item[1], EmptyString[(MaxLength - Length(Item) + 1) div
2 + 1], Length(Item));
end;
OutPutString := OutPutString + EmptyString;
end;
writeln(OutPutString);
end;
finally
writeln;
FreeAndNil(TextLine);
for i := High(TextLines) downto 0 do
FreeAndNil(TextLines[i]);
end;
end;
begin
AlignByColumn(taLeftJustify);
AlignByColumn(taCenter);
AlignByColumn(taRightJustify);
end.
- Output:
Given |a |text |file |of |many |lines, |where |fields |within |a |line are |delineated |by |a |single |'dollar' |character, |write |a |program that |aligns |each |column |of |fields |by |ensuring |that |words |in |each column |are |separated |by |at |least |one |space. Further, |allow |for |each |word |in |a |column |to |be |either |left justified, |right |justified, |or |center |justified |within |its |column. Given | a | text | file | of | many | lines, | where | fields | within | a | line are |delineated | by | a | single | 'dollar' |character, | write | a | program that | aligns | each | column | of | fields | by | ensuring | that | words | in | each column | are | separated | by | at | least | one | space. Further, | allow | for | each | word | in | a | column | to | be | either | left justified, | right |justified, | or | center | justified | within | its | column. Given| a| text| file| of| many| lines,| where| fields| within| a| line are| delineated| by| a| single| 'dollar'| character,| write| a| program that| aligns| each| column| of| fields| by| ensuring| that| words| in| each column| are| separated| by| at| least| one| space. Further,| allow| for| each| word| in| a| column| to| be| either| left justified,| right| justified,| or| center| justified| within| its| column.
Perl
#/usr/bin/perl -w
use strict ;
die "Call : perl columnaligner.pl <inputfile> <printorientation>!\n" unless
@ARGV == 2 ; #$ARGV[ 0 ] contains example file , $ARGV[1] any of 'left' , 'right' or 'center'
die "last argument must be one of center, left or right!\n" unless
$ARGV[ 1 ] =~ /center|left|right/ ;
sub printLines( $$$ ) ;
open INFILE , "<" , "$ARGV[ 0 ]" or die "Can't open $ARGV[ 0 ]!\n" ;
my @lines = <INFILE> ;
close INFILE ;
chomp @lines ;
my @fieldwidths = map length, split /\$/ , $lines[ 0 ] ;
foreach my $i ( 1..$#lines ) {
my @words = split /\$/ , $lines[ $i ] ;
foreach my $j ( 0..$#words ) {
if ( $j <= $#fieldwidths ) {
if ( length $words[ $j ] > $fieldwidths[ $j ] ) {
$fieldwidths[ $j ] = length $words[ $j ] ;
}
}
else {
push @fieldwidths, length $words[ $j ] ;
}
}
}
printLine( $_ , $ARGV[ 1 ] , \@fieldwidths ) foreach @lines ;
################################################################## ####
sub printLine {
my $line = shift ;
my $orientation = shift ;
my $widthref = shift ;
my @words = split /\$/, $line ;
foreach my $k ( 0..$#words ) {
my $printwidth = $widthref->[ $k ] + 1 ;
if ( $orientation eq 'center' ) {
$printwidth++ ;
}
if ( $orientation eq 'left' ) {
print $words[ $k ] ;
print " " x ( $printwidth - length $words[ $k ] ) ;
}
elsif ( $orientation eq 'right' ) {
print " " x ( $printwidth - length $words[ $k ] ) ;
print $words[ $k ] ;
}
elsif ( $orientation eq 'center' ) {
my $left = int( ( $printwidth - length $words[ $k ] ) / 2 ) ;
my $right = $printwidth - length( $words[ $k ] ) - $left ;
print " " x $left ;
print $words[ $k ] ;
print " " x $right ;
}
}
print "\n" ;
}
a shorter solution
use List::Util qw(max);
sub columns {
my @lines = map [split /\$/] => split /\n/ => shift;
my $pos = {qw/left 0 center 1 right 2/}->{+shift};
for my $col (0 .. max map {$#$_} @lines) {
my $max = max my @widths = map {length $_->[$col]} @lines;
for my $row (0 .. $#lines) {
my @pad = map {' ' x $_, ' ' x ($_ + 0.5)} ($max - $widths[$row]) / 2;
for ($lines[$row][$col])
{$_ = join '' => @pad[0 .. $pos-1], $_, @pad[$pos .. $#pad]}
}
}
join '' => map {"@$_\n"} @lines
}
print columns <<'END', $_ for qw(left right center);
Given$a$text$file$of$many$lines,$where$fields$within$a$line$
are$delineated$by$a$single$'dollar'$character,$write$a$program
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
column$are$separated$by$at$least$one$space.
Further,$allow$for$each$word$in$a$column$to$be$either$left$
justified,$right$justified,$or$center$justified$within$its$column.
END
Phix
constant data = { "Given$a$text$file$of$many$lines,$where$fields$within$a$line$", "are$delineated$by$a$single$'dollar'$character,$write$a$program", "that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$", "column$are$separated$by$at$least$one$space.", "Further,$allow$for$each$word$in$a$column$to$be$either$left$", "justified,$right$justified,$or$center$justified$within$its$column." } function split(sequence s, integer c) sequence out = {} integer first = 1, delim while first<=length(s) do delim = find_from(c,s,first) if delim = 0 then delim = length(s)+1 end if out = append(out,s[first..delim-1]) first = delim + 1 end while return out end function function align(sequence s, integer width, integer alignment) integer n = width-length(s) if n<=0 then return s elsif alignment<0 then return s & repeat(' ', n) elsif alignment>0 then return repeat(' ', n) & s else -- (PL if I'd written this, I'd have n-floor(n/2) on the rhs) return repeat(' ', floor(n/2)) & s & repeat(' ', floor(n/2+0.5)) end if end function procedure AlignColumns() integer llij sequence lines, li sequence maxlens = {} lines = repeat(0,length(data)) for i=1 to length(data) do li = split(data[i],'$') lines[i] = li if length(li)>length(maxlens) then maxlens &= repeat(0,length(li)-length(maxlens)) end if for j=1 to length(li) do llij = length(li[j]) if llij>maxlens[j] then maxlens[j] = llij end if end for end for for a=-1 to 1 do -- (alignment = left/centre/right) for i=1 to length(lines) do for j=1 to length(lines[i]) do puts(1, align(lines[i][j],maxlens[j],a) & ' ') end for puts(1,'\n') end for puts(1,'\n') end for if getc(0) then end if end procedure AlignColumns()
- Output:
Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column. Given a text file of many lines, where fields within a line are delineated by a single 'dollar' character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
Phixmonti
include ..\Utilitys.pmt
0 40 repeat var gap
( "Given$a$text$file$of$many$lines,$where$fields$within$a$line$"
"are$delineated$by$a$single$'dollar'$character,$write$a$program"
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$"
"column$are$separated$by$at$least$one$space."
"Further,$allow$for$each$word$in$a$column$to$be$either$left$"
"justified,$right$justified,$or$center$justified$within$its$column." )
len var lines
def alignWords /# -1/0/1 for left/center/right #/
>ps
lines for
get len for >ps
tps get gap ps> get nip 1 +
tps -1 == if -1 * align else
tps 0 == if tostr align else
tps 1 == if align else
drop drop "Wrong!" exitfor
endif endif endif
print
endfor
drop
nl
endfor
ps> drop
enddef
lines for var i
i get "$" " " subst split
len for var j
j get len dup
gap j get rot
< if swap j set else swap drop endif var gap drop
endfor
i set
endfor
-1 alignWords nl
0 alignWords nl
1 alignWords nl
drop
PHP
<?php
$j2justtype = array('L' => STR_PAD_RIGHT,
'R' => STR_PAD_LEFT,
'C' => STR_PAD_BOTH);
/**
Justify columns of textual tabular input where the record separator is the newline
and the field separator is a 'dollar' character.
justification can be L, R, or C; (Left, Right, or Centered).
Return the justified output as a string
*/
function aligner($str, $justification = 'L') {
global $j2justtype;
assert(array_key_exists($justification, $j2justtype));
$justtype = $j2justtype[$justification];
$fieldsbyrow = array();
foreach (explode("\n", $str) as $line)
$fieldsbyrow[] = explode('$', $line);
$maxfields = max(array_map('count', $fieldsbyrow));
foreach (range(0, $maxfields - 1) as $col) {
$maxwidth = 0;
foreach ($fieldsbyrow as $fields)
$maxwidth = max($maxwidth, strlen(array_key_exists($col, $fields) ? $fields[$col] : 0));
foreach ($fieldsbyrow as &$fields)
$fields[$col] = str_pad(array_key_exists($col, $fields) ? $fields[$col] : "", $maxwidth, ' ', $justtype);
unset($fields); // see http://bugs.php.net/29992
}
$result =