Take notes on the command line: Difference between revisions
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=={{header|REBOL}}== |
=={{header|REBOL}}== |
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<lang REBOL>REBOL [ |
<lang REBOL>REBOL [ |
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Title: "Notes" |
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Author: oofoe |
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Date: 2010-10-04 |
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URL: http://rosettacode.org/wiki/Take_notes_on_the_command_line |
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either any [none? args: system/script/args empty? args] [ |
either any [none? args: system/script/args empty? args] [ |
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if exists? notes [print read notes] |
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] [ |
] [ |
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write/binary/append notes rejoin [now lf tab args lf] |
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]</lang> |
]</lang> |
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Revision as of 01:55, 5 October 2010
You are encouraged to solve this task according to the task description, using any language you may know.
Take notes on command line
NOTES.CMD is a commandline tool written as a Batch file. The task is to implement the same in your language.
Invoking NOTES without commandline arguments displays the current contents of the local NOTES.TXT if it exists. If NOTES has arguments, the current date and time are appended to the local NOTES.TXT followed by a newline. Then all the arguments, joined with spaces, prepended with a tab, and appended with a trailing newline, are written to NOTES.TXT. If NOTES.TXT doesn't already exist in the current directory then a new NOTES.TXT file should be created.
AutoHotkey
<lang autohotkey>Notes := "Notes.txt"
If 0 = 0 ; no arguments {
If FileExist(Notes) {
FileRead, Content, %Notes%
MsgBox, %Content%
} Else
MsgBox, %Notes% does not exist
Goto, EOF
}
- date and time, colon, newline (CRLF), tab
Date := A_DD "/" A_MM "/" A_YYYY Time := A_Hour ":" A_Min ":" A_Sec "." A_MSec FileAppend, %Date% %Time%:`r`n%A_Tab%, %Notes%
- command line parameters, trailing newline (CRLF)
Loop, %0%
FileAppend, % %A_Index% " ", %Notes%
FileAppend, `r`n, %Notes%
EOF:</lang>
Batch File
<lang dos>@echo off if %1@==@ (
if exist notes.txt more notes.txt goto :eof
) echo %date% %time%:>>notes.txt echo %*>>notes.txt</lang>
C
<lang c>#include <stdio.h>
- include <time.h>
- define note_file "NOTES.TXT"
int main(int argc, char**argv) { FILE *note; time_t timer; int i; char ch;
if(argc==1) { //Read NOTES.TXT and print it note = fopen(note_file, "r"); if(note!=NULL) { while((ch=getc(note))!=EOF) putchar(ch); } } else { //Write date & time to NOTES.TXT, and then arguments note = fopen(note_file, "a"); if(note!=NULL) { timer = time(NULL); fprintf(note,"%s",asctime(localtime(&timer))); putc('\t', note); for(i=1;i<argc;i++) fprintf(note, "%s ", argv[i]); putc('\n', note); } }
if(note!=NULL) fclose(note); return 0; } </lang>
C++
<lang cpp>#include <fstream>
- include <iostream>
- include <ctime>
using namespace std;
- define note_file "NOTES.TXT"
int main(int argc, char **argv) { if(argc>1) { ofstream Notes(note_file, ios::app); time_t timer = time(NULL); if(Notes.is_open()) { Notes << asctime(localtime(&timer)) << '\t'; for(int i=1;i<argc;i++) Notes << argv[i] << ' '; Notes << endl; Notes.close(); } } else { ifstream Notes(note_file, ios::in); string line; if(Notes.is_open()) { while(!Notes.eof()) { getline(Notes, line); cout << line << endl; } Notes.close(); } } }</lang>
Factor
<lang factor>#! /usr/bin/env factor USING: kernel calendar calendar.format io io.encodings.utf8 io.files sequences command-line namespaces ;
command-line get [
"notes.txt" utf8 file-contents print
] [
" " join "\t" prepend
"notes.txt" utf8 [
now timestamp>ymdhms print
print flush
] with-file-appender
] if-empty</lang>
Forth
The following is SwiftForth-specific, and runs in the Forth environment rather than as a standalone terminal application. Win32Forth only needs simple replacements of DATE and TIME . A Unix Forth would come closer to the 'commandline' requirement, as Windows Forths for whatever reason very eagerly discard the Windows console. Because this runs in the Forth environment, the otherwise acceptable application words are stuffed in a wordlist. Standard Forth doesn't have the notion of create-it-if-it-doesn't-exist, so OPEN just tries again with CREATE-FILE if OPEN-FILE fails.
<lang>vocabulary note-words get-current also note-words definitions
\ -- notes.txt variable file
- open s" notes.txt" r/w open-file if
s" notes.txt" r/w create-file throw then file ! ;
- appending file @ file-size throw file @ reposition-file throw ;
- write file @ write-file throw ;
- close file @ close-file throw ;
\ -- SwiftForth console workaround 9 constant TAB
- type ( c-addr u -- )
bounds ?do i c@ dup TAB = if drop 8 spaces else emit then loop ;
\ -- dump notes.txt create buf 4096 allot
- dump ( -- )
cr begin buf 4096 file @ read-file throw dup while buf swap type repeat drop ;
\ -- time and date
- time @time (time) ;
- date @date (date) ;
\ -- add note
- cr s\" \n" write ;
- tab s\" \t" write ;
- space s" " write ;
- add-note ( c-addr u -- ) appending
date write space time write cr tab ( note ) write cr ;
set-current
\ -- note
- note ( "note" -- )
open 0 parse dup if add-note else 2drop dump then close ;
previous</lang> The following is exactly the same program, but written in 4tH. 4tH has an I/O system which is different from ANS-Forth. The notes file is specified on the commandline. <lang>\ -- notes.txt include lib/argopen.4th include lib/ansfacil.4th
\ -- dump notes.txt 4096 buffer: buf
- dump ( -- )
input 1 arg-open begin buf dup 4096 accept dup while type repeat drop drop close ;
\ -- time and date
- :00 <# # # [char] : hold #> type ;
- -00 <# # # [char] - hold #> type ;
- .time 0 .r :00 :00 ;
- .date 0 .r -00 -00 ;
\ -- add note
- add-note ( c-addr u -- )
output append [+] 1 arg-open -rot time&date .date space .time cr 9 emit type cr close ;
\ -- note
- note ( "note" -- )
argn 2 < abort" Usage: notes filename" refill drop 0 parse dup if add-note else 2drop dump then ;
note</lang>
Haskell
<lang haskell>import System.Environment (getArgs) import System.Time (getClockTime)
main :: IO () main = do
args <- getArgs
if null args
then catch (readFile "notes.txt" >>= putStr)
(\_ -> return ())
else
do ct <- getClockTime
appendFile "notes.txt" $ show ct ++ "\n\t" ++ unwords args ++ "\n"</lang>
Sample output after a few runs:
Thu Apr 22 19:01:41 PDT 2010 Test line 1. Thu Apr 22 19:01:45 PDT 2010 Test line 2.
HicEst
<lang HicEst>SYSTEM(RUN) ! start this script in RUN-mode
CHARACTER notes="Notes.txt", txt*1000
! Remove file name from the global variable $CMD_LINE: EDIT(Text=$CMD_LINE, Mark1, Right=".hic ", Right=4, Mark2, Delete)
IF($CMD_LINE == ' ') THEN
READ(FIle=notes, LENgth=Lnotes) IF( Lnotes ) THEN WINDOW(WINdowhandle=hdl, TItle=notes) WRITE(Messagebox="?Y") "Finished ?" ENDIF
ELSE
WRITE(Text=txt, Format="UWWW CCYY-MM-DD HH:mm:SS, A") 0, $CRLF//$TAB//TRIM($CMD_LINE)//$CRLF OPEN(FIle=notes, APPend) WRITE(FIle=notes, CLoSe=1) txt
ENDIF
ALARM(999) ! quit HicEst immediately</lang>
Thu 2010-09-16 18:42:15 This is line 1 Thu 2010-09-16 18:42:23 This is line 2
J
Solution:
<lang j>require 'files strings'
notes=: monad define
if. #y do. now=. LF ,~ 6!:0 'hh:mm:ss DD/MM/YYYY' 'notes.txt' fappend~ now, LF ,~ TAB, ' ' joinstring y elseif. -. _1 -: txt=. fread 'notes.txt' do. smoutput txt end.
)
notes 2}.ARGV exit 0</lang>
Create a Shortcut called Notes that calls the script above using the Target:
"c:\program files\j602\bin\jconsole.exe" path\to\script\notes.ijs
and Start in: .\
Example Use:
In a Windows CMD session...
C:\Folder>Notes.lnk "Test line 1"
C:\Folder>Notes.lnk "Test" "line" "2"
C:\Folder>Notes.lnk Test line 3
C:\Folder>Notes.lnk
2010 5 21 11 31 30.389
Test line 1
2010 5 21 11 31 50.669
Test line 2
2010 5 21 11 32 14.895
Test line 3
Java
<lang java>import java.io.*; import java.nio.channels.*; import java.util.Date;
public class TakeNotes {
public static void main(String[] args) throws IOException {
if (args.length > 0) {
PrintStream ps = new PrintStream(new FileOutputStream("notes.txt", true));
ps.println(new Date());
ps.print("\t" + args[0]);
for (int i = 1; i < args.length; i++)
ps.print(" " + args[i]);
ps.println();
ps.close();
} else {
FileChannel fc = new FileInputStream("notes.txt").getChannel();
fc.transferTo(0, fc.size(), Channels.newChannel(System.out));
fc.close();
}
}
}</lang>
JavaScript
<lang javascript>var notes = 'NOTES.TXT';
var args = WScript.Arguments; var fso = new ActiveXObject("Scripting.FileSystemObject"); var ForReading = 1, ForWriting = 2, ForAppending = 8;
if (args.length == 0) {
if (fso.FileExists(notes)) {
var f = fso.OpenTextFile(notes, ForReading);
WScript.Echo(f.ReadAll());
f.Close();
}
} else {
var f = fso.OpenTextFile(notes, ForAppending, true);
var d = new Date();
f.WriteLine(d.toLocaleString());
f.Write("\t");
// note that WScript.Arguments is not an array, it is a "collection"
// it does not have a join() method.
for (var i = 0; i < args.length; i++) {
f.Write(args(i) + " ");
}
f.WriteLine();
f.Close();
}</lang>
> del NOTES.TXT
> cscript /nologo notes.js
> cscript /nologo notes.js this is the first note
> cscript /nologo notes.js
April 1, 2010 5:18:38 PM
this is the first note
Lua
<lang lua>filename = "NOTES.TXT"
if #arg == 0 then
fp = io.open( filename, "r" )
if fp ~= nil then
print( fp:read( "*all*" ) )
fp:close()
end
else
fp = io.open( filename, "a+" )
fp:write( os.date( "%x %X\n" ) )
fp:write( "\t" ) for i = 1, #arg do
fp:write( arg[i], " " )
end fp:write( "\n" )
fp:close()
end</lang>
OCaml
<lang ocaml>#! /usr/bin/env ocaml
- load "unix.cma"
let notes_file = "notes.txt"
let take_notes() =
let gmt = Unix.gmtime (Unix.time()) in
let date =
Printf.sprintf "%d-%02d-%02d %02d:%02d:%02d"
(1900 + gmt.Unix.tm_year) (1 + gmt.Unix.tm_mon) gmt.Unix.tm_mday
gmt.Unix.tm_hour gmt.Unix.tm_min gmt.Unix.tm_sec
in
let oc = open_out_gen [Open_append; Open_creat; Open_text] 0o644 notes_file in
output_string oc (date ^ "\t");
output_string oc (String.concat " " (List.tl(Array.to_list Sys.argv)));
output_string oc "\n";
let dump_notes() =
if not(Sys.file_exists notes_file) then (prerr_endline "no local notes found"; exit 1); let ic = open_in notes_file in try while true do print_endline (input_line ic) done with End_of_file -> ()
let () =
if Array.length Sys.argv = 1 then dump_notes() else take_notes()</lang>
Oz
<lang oz>functor import
Application Open OS System
define
fun {TimeStamp}
N = {OS.localTime}
in
(1900+N.year)#"-"#(1+N.mon)#"-"#N.mDay#", "#N.hour#":"#N.min#":"#N.sec
end
fun {Join X|Xr Sep}
{FoldL Xr fun {$ Z X} Z#Sep#X end X}
end
case {Application.getArgs plain}
of nil then
try
F = {New Open.file init(name:"notes.txt")}
in
{System.printInfo {F read(list:$ size:all)}}
{F close}
catch _ then skip end
[] Args then
F = {New Open.file init(name:"notes.txt" flags:[write text create append])}
in
{F write(vs:{TimeStamp}#"\n")}
{F write(vs:"\t"#{Join Args " "}#"\n")}
{F close}
end
{Application.exit 0}
end</lang>
Perl
<lang Perl>my $file = 'notes.txt'; if ( @ARGV ) {
open NOTES, '>>', $file or die "Can't append to file $file: $!"; print NOTES scalar localtime, "\n\t@ARGV\n";
} else {
open NOTES, '<', $file or die "Can't read file $file: $!"; print <NOTES>;
} close NOTES;</lang>
Sample output after a few runs:
Thu Apr 22 19:01:41 2010 Test line 1. Thu Apr 22 19:01:45 2010 Test line 2.
Perl 6
<lang perl6>my $file = 'notes.txt';
multi MAIN() {
print slurp($file);
}
multi MAIN(*@note) {
my $fh = open($file, :a); $fh.say: DateTime.now, "\n\t", @note; $fh.close;
}</lang>
PicoLisp
<lang PicoLisp>#!/usr/bin/picolisp /usr/lib/picolisp/lib.l
(load "@lib/misc.l") (if (argv)
(out "+notes.txt" (prinl (stamp) "^J^I" (glue " " @))) (and (info "notes.txt") (in "notes.txt" (echo))) )
(bye)</lang>
PowerShell
<lang powershell>$notes = "notes.txt" if (($args).length -eq 0) {
if(Test-Path $notes) {
Get-Content $notes
}
} else {
Get-Date | Add-Content $notes "`t" + $args -join " " | Add-Content $notes
}</lang>
PureBasic
<lang PureBasic>#FileName="notes.txt" Define argc=CountProgramParameters() If OpenConsole()
If argc=0
If ReadFile(0,#FileName)
While Eof(0)=0
PrintN(ReadString(0)) ; No new notes, so present the old
Wend
CloseFile(0)
EndIf
Else ; e.g. we have some arguments
Define d$=FormatDate("%yyyy-%mm-%dd %hh:%ii:%ss",date())
If OpenFile(0,#FileName)
Define args$=""
While argc
args$+" "+ProgramParameter() ; Read all arguments
argc-1
Wend
FileSeek(0,Lof(0)) ; Go to the end of this file
WriteStringN(0,d$+#CRLF$+#TAB$+args$) ; Append date & note
CloseFile(0)
EndIf
EndIf
EndIf</lang>
Python
<lang python>import sys, datetime, shutil
- sys.argv[1:] = 'go for it'.split()
if len(sys.argv) == 1:
try:
f = open('notes.txt', 'r')
shutil.copyfileobj(f, sys.stdout)
f.close()
except IOError:
pass
else:
f = open('notes.txt', 'a')
f.write(datetime.datetime.now().isoformat() + '\n')
f.write("\t%s\n" % ' '.join(sys.argv[1:]))
f.close()</lang>
Sample notes.txt file
After assorted runs:
2010-04-01T17:06:20.312000 go for it 2010-04-01T17:08:20.718000 go for it
REBOL
<lang REBOL>REBOL [
Title: "Notes" Author: oofoe Date: 2010-10-04 URL: http://rosettacode.org/wiki/Take_notes_on_the_command_line
]
notes: %notes.txt
either any [none? args: system/script/args empty? args] [
if exists? notes [print read notes]
] [
write/binary/append notes rejoin [now lf tab args lf]
]</lang>
Sample session:
> rebol -w notes.r > rebol -w notes.r "Test line 1" > rebol -w notes.r "Test" "line" "2" > rebol -w notes.r Test line 3 > rebol -w notes.r 4-Oct-2010/21:45:16-5:00 Test line 1 4-Oct-2010/21:45:27-5:00 Test line 2 4-Oct-2010/21:45:36-5:00 Test line 3
Ruby
<lang ruby>notes = 'NOTES.TXT' if ARGV.empty?
File.copy_stream(notes, $stdout) rescue nil
else
File.open(notes, 'a') {|file| file.puts "%s\n\t%s" % [Time.now, ARGV.join(' ')]}
end</lang>
SNOBOL4
<lang snobol>#! /usr/local/bin/snobol4 -b a = 2 ;* skip '-b' parameter notefile = "notes.txt" while args = args host(2,a = a + 1) " " :s(while) ident(args) :f(append) noparms input(.notes,io_findunit(),,notefile) :s(display)f(end) display output = notes :s(display) endfile(notes) :(end) append output(.notes,io_findunit(),"A",notefile) :f(end) notes = date() notes = char(9) args end</lang>
Tcl
<lang tcl># Make it easier to change the name of the notes file set notefile notes.txt
if {$argc} {
# Write a message to the file set msg [clock format [clock seconds]]\n\t[join $argv " "] set f [open $notefile a] puts $f $msg close $f
} else {
# Print the contents of the file
catch {
set f [open $notefile] fcopy $f stdout close $f
}
}</lang> Sample output after a few runs:
Thu Apr 01 19:28:07 BST 2010 test 1 two three Thu Apr 01 19:28:49 BST 2010 TODO: Submit notes.tcl to Rosetta Code
UNIX Shell
Bash version <lang bash># NOTES=$HOME/notes.txt if $# -eq 0 ; then
-r $NOTES && more $NOTES
else
date >> $NOTES echo " $*" >> $NOTES
fi</lang>
"Spoiled Bash kid" version <lang bash>N=~/notes.txt;$# -gt 0 && { date ; echo " $*"; exit 0; } >> $N || -r $N && cat $N</lang>
Portable version
<lang shell>NOTES=$HOME/notes.txt
if test "x$*" = "x"
then
if test -r $NOTES
then
more $NOTES
fi
else
date >> $NOTES
echo " $*" >> $NOTES
fi</lang>