# Jewels and stones

(Redirected from Jewels and Stones)

Jewels and stones
You are encouraged to solve this task according to the task description, using any language you may know.

Create a function which takes two string parameters: 'stones' and 'jewels' and returns an integer.

Both strings can contain any number of upper or lower case letters. However, in the case of 'jewels', all letters must be distinct.

The function should count (and return) how many 'stones' are 'jewels' or, in other words, how many letters in 'stones' are also letters in 'jewels'.

Note that:

1. Only letters in the ISO basic Latin alphabet i.e. 'A to Z' or 'a to z' need be considered.
2. A lower case letter is considered to be different from its upper case equivalent for this purpose, i.e., 'a' != 'A'.
3. The parameters do not need to have exactly the same names.
4. Validating the arguments is unnecessary.

So, for example, if passed "aAAbbbb" for 'stones' and "aA" for 'jewels', the function should return 3.

This task was inspired by this problem.

## 11l

Translation of: Python
```F count_jewels(s, j)
R sum(s.map(x -> Int(x C @j)))

print(count_jewels(‘aAAbbbb’, ‘aA’))
print(count_jewels(‘ZZ’, ‘z’))```
Output:
```3
0
```

## 360 Assembly

```*        Jewels and stones - 24/04/2023
JEWELS   CSECT
USING  JEWELS,R13         base register
B      72(R15)            skip savearea
DC     17F'0'             savearea
SAVE   (14,12)            save previous context
LA     R7,EX1             @ex(1,1)
LA     R6,1               i=1
DO WHILE=(CH,R6,LE,N)       do i=1 to n
MVC    CSTO,0(R7)           csto=ex(i,1)
MVC    CJEW,16(R7)          cjew=ex(i,2)
BAL    R14,COUNT            r0=count(csto,cjew)
LR     R1,R0                count
XDECO  R1,XDEC              edit count
MVC    PG(6),XDEC+6         output count
XPRNT  PG,L'PG              print buffer
LA     R7,32(R7)            @ex+=32
LA     R6,1(R6)             i++
ENDDO    ,                  enddo i
FIN      L      R13,4(0,R13)       restore previous savearea pointer
RETURN (14,12),RC=0       restore registers from calling save
*
COUNT    CNOP   0,4                count(csto,cjew) -------------------
STM    R2,R14,COUNTSA     save context
MVC    CC,CSTO            cc=csto
BAL    R14,LENGTH         call length(csto)
STH    R0,LCSTO           lcsto=length(csto)
MVC    CC,CJEW            cc=cjew
BAL    R14,LENGTH         call length(cjew)
STH    R0,LCJEW           lcjew=length(cjew)
XR     R3,R3              ret=0
LA     R6,1               i=1
DO WHILE=(CH,R6,LE,LCSTO)   do i=1 to length(csto)
LA     R2,CSTO-1            @csto-1
AR     R2,R6                @csto-1+i
MVC    C,0(R2)              c=substr(csto,i,1)
SR     R1,R1                k=0 ....index(cjew,c)...........
LA     R7,1                 j=1                            |
DO WHILE=(CH,R7,LE,LCJEW)     do j=1 to length(cjew)         |
LA     R9,CJEW-1              @cjew-1                      |
AR     R9,R7                  @cjew-1+j                    |
IF   CLC,0(1,R9),EQ,C THEN      if substr(cjew,j,1)=c then   |
LR     R1,R7                    k=j                        |
ENDIF    ,                      endif                        |
LA     R7,1(R7)               j++                          |
ENDDO    ,                    enddo j ........................
IF   LTR,R1,NZ,R1 THEN        if index(cjew,c)<>0 then
LA     R3,1(R3)               ret=ret+1
ENDIF    ,                    endif
LA     R6,1(R6)             i++
ENDDO    ,                  enddo i
LR     R0,R3              return value ret
LM     R2,R14,COUNTSA     restore context
BR     R14                return
COUNTSA  DS     14A                context store -- end count ---------
*
LENGTH   CNOP   0,4                length(cc) -------------------------
STM    R2,R14,LENGTSA     save context
LA     R10,0              l=0
LA     R9,CC              @cc
LA     R8,1               k=1
DO WHILE=(C,R8,LE,=A(16))   do k=1 to 16
MVC    C,0(R9)              c=subsctr(cc,k,1)
IF   CLC,C,NE,=C' ' THEN      if c<>' ' then
LA     R10,1(R10)             l=l+1
ELSE     ,                    else
B      LEAVEK                 leave k
ENDIF    ,                    endif
LA     R9,1(R9)             @cc++
LA     R8,1(R8)             k++
ENDDO    ,                  enddo k
LEAVEK   LR     R0,R10             set return value
LM     R2,R14,LENGTSA     restore context
BR     R14                return
LENGTSA  DS     14A                context store -- end length --------
*
N        DC     H'2'               n
EX1      DC     CL16'aAAbbbb'      stones(1)
DC     CL16'aA'           jewels(1)
EX2      DC     CL16'ZZ'           stones(2)
DC     CL16'z'            jewels(2)
CSTO     DS     CL16               csto
CJEW     DS     CL16               cjew
LCSTO    DS     H                  length of csto
LCJEW    DS     H                  length of cjew
CC       DS     CL16               cc
C        DS     CL1                c
PG       DC     CL80' '            buffer
XDEC     DS     CL12               temp for xdeco
REGEQU
END    JEWELS```
Output:
```     3
0
```

## 8080 Assembly

```	org	100h
jmp	demo
;;;	Count jewels.
;;;	Input: BC = jewels, DE = stones.
;;;	Output: BC = count
;;;	Destroyed: A, DE, HL
jewel:	lxi	h,jarr	; Zero out the page of memory
xra	a
jzero:	mov	m,a
inr	l
jnz	jzero
jrjwl:	ldax	b	; Get jewel
inx	b
mov	l,a	; Mark the corresponding byte in the array
inr	m
ana	a	; If 'jewel' is 0, we've reached the end
jnz	jrjwl	; Otherwise, do next jewel
lxi	b,0	; BC = count (we no longer need the jewel string)
jrstn:	ldax	d	; Get stone
inx	d
ana	a	; If zero, we're done
rz
mov	l,a	; Get corresponding byte in array
mov	a,m
ana	a
jz	jrstn	; If zero, it is not a jewel
inx	b	; But otherwise, it is a jewel
jmp	jrstn
;;;	Demo code
demo:	lxi	b,jewels	; Set up registers
lxi	d,stones
call	jewel		; Call the function
;;;	Print the number
lxi	h,num	; Pointer to number string
push	h	; Push to stack
mov	h,b	; HL = number to print
mov	l,c
lxi	b,-10	; Divisor
dgt:	lxi	d,-1	; Quotient
dgtlp:	inx	d	; Divide using trial subtraction
jc	dgtlp
mvi	a,'0'+10
add	l	; HL = remainder-10
pop	h	; Get pointer
dcx	h	; Decrement pointer
mov	m,a	; Store digit
push	h	; Put pointer back
xchg		; Go on with new quotient
mov	a,h	; If 0, we're done
ana	l
jnz	dgt	; If not 0, next digit
pop	d	; Get pointer and put it in DE
mvi	c,9	; CP/M syscall to print string
jmp	5
db	'*****'	; Placeholder for ASCII number output
num:	db	'\$'
jewels:	db	'aA',0
stones:	db	'aAAbbbb',0
;;;	Next free page of memory is used for the jewel array
jpage:	equ	\$/256+1
jarr:	equ	jpage*256```
Output:
`3`

## 8086 Assembly

```	cpu	8086
bits	16
org	100h
section	.text
jmp	demo
;;;	Count jewels.
;;;	Input: DS:SI = jewels, DS:DX = stones
;;;	Output: CX = how many stones are jewels
;;;	Destroyed: AX, BX, SI, DI
jewel:	xor	ax,ax
mov	cx,128		; Allocate 256 bytes (128 words) on stack
.zloop:	push	ax		; Set them all to zero
loop	.zloop
mov	di,sp		; DI = start of array
xor	bh,bh
.sjwl:	lodsb			; Get jewel
mov	bl,al
inc	byte [ss:di+bx]	; Set corresponding byte
test	al,al		; If not zero, there are more jewels
jnz	.sjwl
.sstn:	lodsb			; Get stone
mov	bl,al		; Get corresponding byte
mov	bl,[ss:di+bx]
test	al,al		; If not zero, there are more stones
jnz	.sstn
add	sp,256		; Otherwise, we are done - free the array
dec	cx		; The string terminator is a 'jewel', so remove
ret
;;;	Demo
demo:	mov	si,jewels	; Set up registers
mov	dx,stones
call	jewel		; Call the function
;;;	Print number
mov	ax,10		; Result is in CX
xchg	ax,cx		; Set AX to result and CX to divisor (10)
mov	bx,num		; Number pointer
dgt:	xor	dx,dx
div	cx		; Divide AX by 10
dec	bx		; Store digit in string
mov	[bx],dl
test	ax,ax		; Any more digits?
jnz	dgt		; If so, next digit
mov	dx,bx		; When done, print string
mov	ah,9
int	21h
ret
section	.data
db	'*****'		; Placeholder for ASCII number output
num:	db	'\$'
stones:	db	'aAAbbbb',0	; Example from the task
jewels:	db	'aA',0
```
Output:
`3`

## AArch64 Assembly

Works with: as version Raspberry Pi 3B version Buster 64 bits
or android 64 bits with application Termux
```/* ARM assembly AARCH64 Raspberry PI 3B */
/*  program jewels64.s   */

/************************************/
/* Constantes                       */
/************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeConstantesARM64.inc"

/************************************/
/* Initialized data                 */
/************************************/
.data
szMessResult:         .asciz "Result: "
szStone1:             .asciz "aAAbbbb"
szJewels1:            .asciz "aA"
szStone2:             .asciz "ZZ"
szJewels2:            .asciz "z"
szCarriageReturn:     .asciz "\n"
szMessStart:          .asciz "Program 64 bits start.\n"
/************************************/
/* UnInitialized data               */
/************************************/
.bss
sZoneConv:            .skip 24
/************************************/
/*  code section                    */
/************************************/
.text
.global main
main:                      // entry of program
bl affichageMess

bl countJewels
bl countJewels

100:                       // standard end of the program
mov x0, #0             // return code
mov x8, #EXIT          // request to exit program
svc 0                  // perform the system call
/***************************************************/
/*   count jewels in stone                   */
/***************************************************/
/* r0 contains stone address */
/* r1 contains jewels address */
/* r0 return jewels count */
countJewels:
stp x1,lr,[sp,-16]!
stp x2,x3,[sp,-16]!
stp x4,x5,[sp,-16]!
stp x6,x7,[sp,-16]!
mov x4,#0            // counter
mov x3,#0            // index stone
1:
ldrb w6,[x0,x3]      // load byte of stone
cmp x6,#0            // end stone ?
beq 3f
mov x5,#0            // index jewels
2:
ldrb w2,[x1,x5]      // load byte of jewels
cmp x2,#0            // end jewels ?
cinc x3,x3,eq        // yes -> increment index stone
beq 1b               // and loop
cmp x6,x2            // compare byte
cinc x5,x5,ne        // not equal -> increment jewels index
bne 2b               // and loop
add x4,x4,#1         // else increment counter
add x3,x3,#1         // incremente index stone
b 1b                 // and loop

3:                       // result display
mov x0,x4
bl conversion10
bl affichageMess
bl affichageMess
bl affichageMess

mov x0,x4
100:
ldp x6,x7,[sp],16
ldp x4,x5,[sp],16
ldp x2,x3,[sp],16
ldp x1,lr,[sp],16
ret
/***************************************************/
/*      ROUTINES INCLUDE                           */
/***************************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeARM64.inc"```
Output:
```Program 64 bits start.
Result: 3
Result: 0
```

## ABC

```HOW TO RETURN stones count.in jewels:
PUT 0 IN count
FOR stone IN stones:
IF stone in jewels: PUT count+1 IN count
RETURN count

WRITE "aAAbbbb" count.in "aA"/
WRITE "ZZ" count.in "z"/```
Output:
```3
0```

```with Ada.Text_IO;

procedure Jewels_And_Stones is

function Count (Jewels, Stones : in String) return Natural is
Sum : Natural := 0;
begin
for J of Jewels loop
for S of Stones loop
if J = S then
Sum := Sum + 1;
exit;
end if;
end loop;
end loop;
return Sum;
end Count;

procedure Show (Jewels, Stones : in String) is
begin
Put (Jewels);
Set_Col (12); Put (Stones);
Set_Col (20); Put (Count (Jewels => Jewels,
Stones => Stones)'Image);
New_Line;
end Show;

begin
Show ("aAAbbbb", "aA");
Show ("ZZ",      "z");
end Jewels_And_Stones;
```
Output:
```aAAbbbb    aA       3
ZZ         z        0```

## ALGOL 68

```BEGIN
# procedure that counts the number of times the letters in jewels occur in stones #
PROC count jewels = ( STRING stones, jewels )INT:
BEGIN
# count the occurences of each letter in stones #
INT upper a pos = 0;
INT lower a pos = 1 + ( ABS "Z" - ABS "A" );
[ upper a pos : lower a pos + 26 ]INT letter counts;
FOR c FROM LWB letter counts TO UPB letter counts DO letter counts[ c ] := 0 OD;
FOR s pos FROM LWB stones TO UPB stones DO
CHAR s = stones[ s pos ];
IF   s >= "A" AND s <= "Z" THEN letter counts[ upper a pos + ( ABS s - ABS "A" ) ] +:= 1
ELIF s >= "a" AND s <= "z" THEN letter counts[ lower a pos + ( ABS s - ABS "a" ) ] +:= 1
FI
OD;
# sum the counts of the letters that appear in jewels #
INT count := 0;
FOR j pos FROM LWB jewels TO UPB jewels DO
CHAR j = jewels[ j pos ];
IF   j >= "A" AND j <= "Z" THEN count +:= letter counts[ upper a pos + ( ABS j - ABS "A" ) ]
ELIF j >= "a" AND j <= "z" THEN count +:= letter counts[ lower a pos + ( ABS j - ABS "a" ) ]
FI
OD;
count
END # count jewels # ;

print( ( count jewels( "aAAbbbb", "aA" ), newline ) );
print( ( count jewels( "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz"
, "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz"
)
, newline
)
);
print( ( count jewels( "AB", "" ), newline ) );
print( ( count jewels( "ZZ", "z" ), newline ) )

END```
Output:
```         +3
+52
+0
+0```

## APL

Works with: Dyalog APL
```jewels ← +/∊⍨
```
Output:
```      'aA' jewels 'aAAbbbb'
3```

## AppleScript

### Functional

```-- jewelCount :: String -> String -> Int
on jewelCount(jewels, stones)
set js to chars(jewels)
script
on |λ|(a, c)
if elem(c, jewels) then
a + 1
else
a
end if
end |λ|
end script
foldl(result, 0, chars(stones))
end jewelCount

-- OR in terms of filter
-- jewelCount :: String -> String -> Int
on jewelCount2(jewels, stones)
script
on |λ|(c)
elem(c, jewels)
end |λ|
end script
length of filter(result, stones)
end jewelCount2

-- TEST --------------------------------------------------
on run

unlines(map(uncurry(jewelCount), ¬
{Tuple("aA", "aAAbbbb"), Tuple("z", "ZZ")}))

end run

-- GENERIC FUNCTIONS -------------------------------------

-- Tuple (,) :: a -> b -> (a, b)
on Tuple(a, b)
{type:"Tuple", |1|:a, |2|:b}
end Tuple

-- chars :: String -> [Char]
on chars(s)
characters of s
end chars

-- elem :: Eq a => a -> [a] -> Bool
on elem(x, xs)
considering case
xs contains x
end considering
end elem

-- filter :: (a -> Bool) -> [a] -> [a]
on filter(f, xs)
tell mReturn(f)
set lst to {}
set lng to length of xs
repeat with i from 1 to lng
set v to item i of xs
if |λ|(v, i, xs) then set end of lst to v
end repeat
return lst
end tell
end filter

-- 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

-- 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

-- Lift 2nd class handler function into 1st class script wrapper
-- mReturn :: First-class m => (a -> b) -> m (a -> b)
on mReturn(f)
if class of f is script then
f
else
script
property |λ| : f
end script
end if
end mReturn

-- Returns a function on a single tuple (containing 2 arguments)
-- derived from an equivalent function with 2 distinct arguments
-- uncurry :: (a -> b -> c) -> ((a, b) -> c)
on uncurry(f)
script
property mf : mReturn(f)'s |λ|
on |λ|(pair)
mf(|1| of pair, |2| of pair)
end |λ|
end script
end uncurry

-- unlines :: [String] -> String
on unlines(xs)
set {dlm, my text item delimiters} to ¬
{my text item delimiters, linefeed}
set str to xs as text
set my text item delimiters to dlm
str
end unlines
```
Output:
```3
0```

### Idiomatic

```on jewelsAndStones(stones, jewels)
set counter to 0
considering case
repeat with thisCharacter in stones
if (thisCharacter is in jewels) then set counter to counter + 1
end repeat
end considering

return counter
end jewelsAndStones

jewelsAndStones("aAAbBbb", "aAb")
```
Output:
```6
```

## ARM Assembly

Works with: as version Raspberry Pi
or android 32 bits with application Termux
```/* ARM assembly Raspberry PI  */
/*  program jewels.s   */

/************************************/
/* Constantes                       */
/************************************/
/* for this file see task include a file in language ARM assembly*/
.include "../constantes.inc"

/************************************/
/* Initialized data                 */
/************************************/
.data
szMessResult:         .asciz "Result: "
szStone1:             .asciz "aAAbbbb"
szJewels1:            .asciz "aA"
szStone2:             .asciz "ZZ"
szJewels2:            .asciz "z"
szCarriageReturn:     .asciz "\n"
szMessStart:          .asciz "Program 32 bits start.\n"
/************************************/
/* UnInitialized data               */
/************************************/
.bss
sZoneConv:            .skip 24
/************************************/
/*  code section                    */
/************************************/
.text
.global main
main:                      @ entry of program
bl affichageMess

bl countJewels
bl countJewels

100:                       @ standard end of the program
mov r0, #0             @ return code
mov r7, #EXIT          @ request to exit program
svc 0                  @ perform the system call
/***************************************************/
/*   count jewels in stone                   */
/***************************************************/
/* r0 contains stone address */
/* r1 contains jewels address */
/* r0 return jewels count */
countJewels:
push {r1-r6,lr}      @ save registers
mov r4,#0            @ counter
mov r3,#0            @ index stone
1:
ldrb r6,[r0,r3]      @ load byte of stone
cmp r6,#0            @ end stone ?
beq 3f
mov r5,#0            @ index jewels
2:
ldrb r2,[r1,r5]      @ load byte of jewels
cmp r2,#0            @ end jewels ?
addeq r3,r3,#1       @ yes -> increment index stone
beq 1b               @ and loop
cmp r6,r2            @ compare byte
addne r5,r5,#1       @ not equal -> increment jewels index
bne 2b               @ and loop
add r4,r4,#1         @ else increment counter
add r3,r3,#1         @ incremente index stone
b 1b                 @ and loop

3:                       @ result display
mov r0,r4
bl conversion10
bl affichageMess
bl affichageMess
bl affichageMess

mov r0,r4
100:
pop {r1-r6,pc}
/***************************************************/
/*      ROUTINES INCLUDE                           */
/***************************************************/
/* for this file see task include a file in language ARM assembly*/
.include "../affichage.inc"```
Output:

with the file unixdict.txt

```Program 32 bits start.
Result: 3
Result: 0
```

## Arturo

```count: function [jewels,stones][
size select split stones => [in? & jewels]
]

print count "aA" "aAAbbbb"
```
Output:
`3`

## AutoHotkey

```JewelsandStones(ss, jj){
for each, jewel in StrSplit(jj)
for each, stone in StrSplit(ss)
if (stone == jewel)
num++
return num
}
```

Example:

```MsgBox % JewelsandStones("aAAbbbbz", "aAZ")
return
```

Outputs:

`3`

## AWK

```# syntax: GAWK -f JEWELS_AND_STONES.AWK
BEGIN {
printf("%d\n",count("aAAbbbb","aA"))
printf("%d\n",count("ZZ","z"))
exit(0)
}
function count(stone,jewel,  i,total) {
for (i=1; i<length(stone); i++) {
if (jewel ~ substr(stone,i,1)) {
total++
}
}
return(total)
}
```
Output:
```3
0```

## BASIC

```10 READ N%
20 FOR A%=1 TO N%
40 GOSUB 100
50 PRINT S\$;" in ";J\$;":";J%
60 NEXT
70 END

100 REM Count how many stones (S\$) are jewels (J\$).
110 DIM J%(127)
120 J%=0
130 FOR I%=1 TO LEN(J\$): J%(ASC(MID\$(J\$,I%,1)))=1: NEXT
140 FOR I%=1 TO LEN(S\$): J%=J%+J%(ASC(MID\$(S\$,I%,1))): NEXT
150 ERASE J%
160 RETURN

200 DATA 2
210 DATA "aA","aAAbbbb"
220 DATA "z","ZZZZ"
```
Output:
```aAAbbbb in aA: 3
ZZZZ in z: 0```

### BASIC256

```function contar_joyas(piedras, joyas)
cont = 0
for i = 1 to length(piedras)
bc = instr(joyas, mid(piedras, i, 1), 1)
if bc <> 0 then cont += 1
next i
return cont
end function

print contar_joyas("aAAbbbb", "aA")
print contar_joyas("ZZ", "z")
print contar_joyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
print contar_joyas("AB", "")```
Output:
`Same as FreeBASIC entry.`

### Chipmunk Basic

Works with: Chipmunk Basic version 3.6.4
```100 cls
110 print contjoyas("aAAbbbb","aA")
120 print contjoyas("ZZ","z")
130 print contjoyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz","ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
140 print contjoyas("AB","")
150 end
160 sub contjoyas(piedras\$,joyas\$)
180  sgte = 0
190  for i = 1 to len(piedras\$)
200   bc = instr(joyas\$,mid\$(piedras\$,i,1))
210   if bc <> 0 then sgte = sgte+1
220  next i
230  contjoyas = sgte
240 end sub```

### FreeBASIC

```function contar_joyas(piedras as string, joyas as string) as integer
dim as integer bc, cont = 0
for i as integer = 1 to len(piedras)
bc = instr(1, joyas, mid(piedras, i, 1))
if bc <> 0 then cont += 1
next i
contar_joyas = cont
end function

print contar_joyas("aAAbbbb", "aA")
print contar_joyas("ZZ", "z")
print contar_joyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz", _
"ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
print contar_joyas("AB", "")```
Output:
```3
0
53
0```

### FutureBasic

```window 1, @"Jewels and Stones"

local fn JewelsAndStones( jewels as CFStringRef, stones as CFStringRef ) as long
long index, count = 0

for index = 0 to len(stones) - 1
if ( fn StringContainsString( jewels, mid(stones,index,1) ) ) then count++
next
end fn = count

print fn JewelsAndStones( @"aA", @"aAAbbbb" )
print fn JewelsAndStones( @"z", @"ZZ" )

HandleEvents```
Output:
```3
0```

### GW-BASIC

Works with: QBasic
Works with: BASICA
Works with: Chipmunk Basic
Works with: GW-BASIC
Works with: MSX BASIC
Works with: Just BASIC
Works with: Liberty BASIC
Works with: Run BASIC
```100 CLS
110 piedras\$ = "aAAbbbb"
120 joyas\$ = "aA"
130 GOSUB 240: PRINT cntjoyas
140 piedras\$ = "ZZ"
150 joyas\$ = "z"
160 GOSUB 240: PRINT cntjoyas
170 piedras\$ = "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz"
180 joyas\$ = "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz"
190 GOSUB 240: PRINT cntjoyas
200 piedras\$ = "AB"
210 joyas\$ = ""
220 GOSUB 240: PRINT cntjoyas
230 END
240 sgte = 0
250 FOR i = 1 TO LEN(piedras\$)
260  bc = INSTR(joyas\$, MID\$(piedras\$, i, 1))
270  IF bc <> 0 THEN sgte = sgte + 1
280 NEXT i
290 cntjoyas = sgte
300 RETURN
310 END
```
Output:
`Same as FreeBASIC entry.`

### MSX Basic

The GW-BASIC solution works without any changes.

### QBasic

Works with: QBasic version 1.1
Works with: QuickBasic version 4.5
```FUNCTION contarjoyas (piedras\$, joyas\$)
cont = 0
FOR i = 1 TO LEN(piedras\$)
bc = INSTR(1, joyas\$, MID\$(piedras\$, i, 1))
IF bc <> 0 THEN cont = cont + 1
NEXT i
contarjoyas = cont
END FUNCTION

PRINT contarjoyas("aAAbbbb", "aA")
PRINT contarjoyas("ZZ", "z")
PRINT contarjoyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
PRINT contarjoyas("AB", "")
END
```
Output:
`Same as FreeBASIC entry.`

### Run BASIC

Works with: Just BASIC
Works with: Liberty BASIC
```sub contar_joyas(piedras\$, joyas\$)
local count, i, bc

cont = 0
for i = 1 to len(piedras\$)
bc = instr(joyas\$, mid\$(piedras\$, i, 1))
if bc <> 0  cont = cont + 1
next i
return cont
end sub

print contar_joyas("aAAbbbb", "aA")
print contar_joyas("ZZ", "z")
print contar_joyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
print contar_joyas("AB", "")
end```
Output:
`Same as FreeBASIC entry.`

### True BASIC

```FUNCTION contarjoyas(piedras\$, joyas\$)
LET c = 0
FOR i = 1 TO LEN(piedras\$)
LET bc = POS(joyas\$,(piedras\$)[i:i+1-1],1)
IF bc <> 0 THEN LET c = c + 1
NEXT i
LET contarjoyas = c
END FUNCTION

PRINT contarjoyas("aAAbbbb", "aA")
PRINT contarjoyas("ZZ", "z")
PRINT contarjoyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
PRINT contarjoyas("AB", "")
END
```
Output:
`Same as FreeBASIC entry.`

### VBA

Translation of: Phix
```Function count_jewels(stones As String, jewels As String) As Integer
Dim res As Integer: res = 0
For i = 1 To Len(stones)
res = res - (InStr(1, jewels, Mid(stones, i, 1), vbBinaryCompare) <> 0)
Next i
count_jewels = res
End Function
Public Sub main()
Debug.Print count_jewels("aAAbbbb", "aA")
Debug.Print count_jewels("ZZ", "z")
End Sub```
Output:
``` 3
0 ```

### Visual Basic .NET

Translation of: C#
```Module Module1

Function Count(stones As String, jewels As String) As Integer
Dim bag = jewels.ToHashSet
End Function

Sub Main()
Console.WriteLine(Count("aAAbbbb", "Aa"))
Console.WriteLine(Count("ZZ", "z"))
End Sub

End Module
```
Output:
```3
0```

### Yabasic

```print contar_joyas("aAAbbbb", "aA")
print contar_joyas("ZZ", "z")
print contar_joyas("ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKLMNOPQRSTUVWXYZ@abcdefghijklmnopqrstuvwxyz")
print contar_joyas("AB", "")
end

sub contar_joyas(piedras\$, joyas\$)
local count, i, bc

cont = 0
for i = 1 to len(piedras\$)
bc = instr(joyas\$, mid\$(piedras\$, i, 1))
if bc <> 0  cont = cont + 1
next i
return cont
end sub```
Output:
`Same as FreeBASIC entry.`

## BCPL

```get "libhdr"

let jewels(j, s) = valof
\$(  let jewel = vec 255
let count = 0
for i = 0 to 255 do jewel!i := false
for i = 1 to j%0 do jewel!(j%i) := true
for i = 1 to s%0 do
if jewel!(s%i) then
count := count + 1
resultis count
\$)

let show(j, s) be
writef("*"%S*" in *"%S*": %N*N", j, s, jewels(j, s))

let start() be
\$(  show("aA", "aAAbbbb")
show("z", "ZZ")
\$)```
Output:
```"aA" in "aAAbbbb": 3
"z" in "ZZ": 0```

## BQN

Similar in nature to APL, mostly due to how trivial the problem is in an array language.

```Jewels←+´∊˜
```
```  "aA" Jewels "aAAbbbb"
3
```

## Bracmat

```  ( f
=   stones jewels N
.   !arg:(?stones.?jewels)
& 0:?N
& ( @( !stones
:   ?
(   %@
: [%(   @(!jewels:? !sjt ?)
& 1+!N:?N
|
)
& ~
)
?
)
| !N
)
)
& f\$(aAAbbbb.aA)```

Output

`3`

## C

Translation of: Kotlin
```#include <stdio.h>
#include <string.h>

int count_jewels(const char *s, const char *j) {
int count = 0;
for ( ; *s; ++s) if (strchr(j, *s)) ++count;
return count;
}

int main() {
printf("%d\n", count_jewels("aAAbbbb", "aA"));
printf("%d\n", count_jewels("ZZ", "z"));
return 0;
}
```
Output:
```3
0
```

## C#

```using System;
using System.Linq;

public class Program
{
public static void Main() {
Console.WriteLine(Count("aAAbbbb", "Aa"));
Console.WriteLine(Count("ZZ", "z"));
}

private static int Count(string stones, string jewels) {
var bag = jewels.ToHashSet();
return stones.Count(bag.Contains);
}
}
```
Output:
```3
0
```

## C++

Translation of: D
```#include <algorithm>
#include <iostream>

int countJewels(const std::string& s, const std::string& j) {
int count = 0;
for (char c : s) {
if (j.find(c) != std::string::npos) {
count++;
}
}
return count;
}

int main() {
using namespace std;

cout << countJewels("aAAbbbb", "aA") << endl;
cout << countJewels("ZZ", "z") << endl;

return 0;
}
```
Output:
```3
0```

## CLU

```count_jewels = proc (jewels, stones: string) returns (int)
is_jewel: array[bool] := array[bool]\$fill(0, 256, false)
for c: char in string\$chars(jewels) do
is_jewel[char\$c2i(c)] := true
end

n_jewels: int := 0
for c: char in string\$chars(stones) do
if is_jewel[char\$c2i(c)] then n_jewels := n_jewels + 1 end
end
return (n_jewels)
end count_jewels

show = proc (jewels, stones: string)
po: stream := stream\$primary_output()

stream\$putl(po, "\"" || jewels || "\" in \"" || stones || "\": "
|| int\$unparse(count_jewels(jewels, stones)))
end show

start_up = proc ()
show("aA", "aAAbbbb")
end start_up```
Output:
`"aA" in "aAAbbbb": 3`

## Cowgol

```include "cowgol.coh";

sub count_jewels(stones: [uint8], jewels: [uint8]): (count: uint16) is
var jewel_mark: uint8[256];
MemZero(&jewel_mark as [uint8], 256);

while [jewels] != 0 loop
jewel_mark[[jewels]] := 1;
jewels := @next jewels;
end loop;

count := 0;
while [stones] != 0 loop
count := count + jewel_mark[[stones]] as uint16;
stones := @next stones;
end loop;
end sub;

sub print_and_count(stones: [uint8], jewels: [uint8]) is
print(jewels);
print(" in ");
print(stones);
print(": ");
print_i16(count_jewels(stones, jewels));
print_nl();
end sub;

print_and_count("aAAbbbb", "aA");
print_and_count("ZZ", "z");```
Output:
```aA in aAAbbbb: 3
z in ZZ: 0```

## Crystal

```stones, jewels = "aAAbbbb", "aA"
stones.count(jewels) # => 3

# The above solution works for that case, but fails with certain other "jewels":
stones, jewels = "aA^Bb", "^b"
stones.count(jewels) # => 4
# '^b' in the "jewels" is read as "characters other than 'b'".

# This works as intended though:
stones.count { |c| jewels.chars.includes?(c) } # => 2
```

## D

Translation of: Kotlin
```import std.algorithm;
import std.stdio;

int countJewels(string s, string j) {
int count;
foreach (c; s) {
if (j.canFind(c)) {
count++;
}
}
return count;
}

void main() {
countJewels("aAAbbbb", "aA").writeln;
countJewels("ZZ", "z").writeln;
}
```
Output:
```3
0```

## Delphi

Works with: Delphi version 6.0

```function CommonLetters(S1,S2: string): integer;
{Count the number of letters in S1 are found in S2}
var I, J: integer;
begin
Result:=0;
for I:=1 to Length(S1) do
for J:=1 to Length(S2) do
if S1[I]=S2[J] then Inc(Result);
end;

procedure ShowJewelsStones(Memo: TMemo; Jewels,Stones: string);
{Show one Jewels-Stones comparison}
begin
end;

procedure TestJewelsStones(Memo: TMemo);
begin
ShowJewelsStones(Memo,'aAAbbbb', 'aA');
ShowJewelsStones(Memo,'ZZ','z');
end;
```
Output:
```aAAbbbb aA 3
ZZ z 0
```

## Draco

```proc nonrec count_jewels(*char jewels, stones) word:
[256] bool jewel;
word count;
byte i;
char c;

for i from 0 upto 255 do jewel[i] := false od;
while c := jewels*; c ~= '\e' do
jewel[c] := true;
jewels := jewels + 1;
od;

count := 0;
while c := stones*; c ~= '\e' do
if jewel[c] then count := count + 1 fi;
stones := stones + 1
od;
count
corp

proc nonrec show(*char jewels, stones) void:
writeln("'", jewels, "' in '", stones, "': ", count_jewels(jewels, stones))
corp

proc nonrec main() void:
show("aA", "aAAbbbb");
show("z", "ZZ")
corp```
Output:
```'aA' in 'aAAbbbb': 3
'z' in 'ZZ': 0```

## Dyalect

Translation of: Swift
```func countJewels(stones, jewels) {
stones.Iterate().Map(x => jewels.Contains(x) ? 1 : 0).Reduce((x,y) => x + y, 0)
}

print(countJewels("aAAbbbb", "aA"))
print(countJewels("ZZ", "z"))```
Output:
```3
0```

## EasyLang

```func count stones\$ jewels\$ .
len d[] 65536
for c\$ in strchars jewels\$
d[strcode c\$] = 1
.
for c\$ in strchars stones\$
if d[strcode c\$] = 1
cnt += 1
.
.
return cnt
.
print count "aAAbbbb" "aA"
print count "ZZ" "z"```

## F#

```let fN jewels stones=stones|>Seq.filter(fun n->Seq.contains n jewels)|>Seq.length
printfn "%d" (fN "aA" "aAAbbbb")
```
Output:
```3
```

## Factor

```USING: kernel prettyprint sequences ;

: count-jewels ( stones jewels -- n ) [ member? ] curry count ;

"aAAbbbb" "aA"
"ZZ" "z" [ count-jewels . ] 2bi@
```
Output:
```3
0
```

## Euphoria

```function number_of(object jewels, object stones) -- why limit ourselves to strings?
integer ct = 0
for i = 1 to length(stones) do
ct += find(stones[i],jewels) != 0
end for
return ct
end function

? number_of("aA","aAAbbbb")
? number_of("z","ZZ")
? number_of({1,"Boo",3},{1,2,3,'A',"Boo",3}) -- might as well send a list of things to find, not just one!```
Output:
```3
0
4 -- 1 is found once, "Boo" is found once, and 3 is found twice = 4 things in the search list were found in the target list
```

## Go

Four solutions are shown here. The first of two simpler solutions iterates over the stone string in an outer loop and makes repeated searches into the jewel string, incrementing a count each time it finds a stone in the jewels. The second of the simpler solutions reverses that, iterating over the jewel string in the outer loop and accumulating counts of matching stones. This solution works because we are told that all letters of the jewel string must be unique. These two solutions are simple but are both O(|j|*|s|).

The two more complex solutions are analogous to the two simpler ones but build a set or multiset as preprocessing step, replacing the inner O(n) operation with an O(1) operation. The resulting complexity in each case is O(|j|+|s|).

Outer loop stones, index into jewels:

```package main

import (
"fmt"
"strings"
)

func js(stones, jewels string) (n int) {
for _, b := range []byte(stones) {
if strings.IndexByte(jewels, b) >= 0 {
n++
}
}
return
}

func main() {
fmt.Println(js("aAAbbbb", "aA"))
}
```
Output:
`3`

Outer loop jewels, count stones:

```func js(stones, jewels string) (n int) {
for _, b := range []byte(jewels) {
n += strings.Count(stones, string(b))
}
return
}
```

Construct jewel set, then loop over stones:

```func js(stones, jewels string) (n int) {
var jSet ['z' + 1]int
for _, b := range []byte(jewels) {
jSet[b] = 1
}
for _, b := range []byte(stones) {
n += jSet[b]
}
return
}
```

Construct stone multiset, then loop over jewels:

```func js(stones, jewels string) (n int) {
var sset ['z' + 1]int
for _, b := range []byte(stones) {
sset[b]++
}
for _, b := range []byte(jewels) {
n += sset[b]
}
return
}
```

```jewelCount
:: Eq a
=> [a] -> [a] -> Int
jewelCount jewels = foldr go 0
where
go c
| c `elem` jewels = succ
| otherwise = id

--------------------------- TEST -------------------------
main :: IO ()
main = mapM_ print \$ uncurry jewelCount <\$> [("aA", "aAAbbbb"), ("z", "ZZ")]
```
Output:
```3
0```

Or in terms of filter rather than foldr

```jewelCount
:: Eq a
=> [a] -> [a] -> Int
jewelCount jewels = length . filter (`elem` jewels)

--------------------------- TEST -------------------------
main :: IO ()
main = do
print \$ jewelCount "aA" "aAAbbbb"
print \$ jewelCount "z" "ZZ"
```
Output:
```3
0```

## J

```   NB. jewels sums a raveled equality table
NB. use: x jewels y  x are the stones, y are the jewels.
intersect =: -.^:2
jewels =: ([: +/ [: , =/~) ~.@:intersect&Alpha_j_

'aAAbbbb ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz' jewels&>&;: 'aA ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz'
3 52

'none' jewels ''
0
'ZZ' jewels 'z'
0
```

A simpler implementation, which satisfies the task requirements but does not explicitly ignore non-letters, would be:

```jewels=: +/@e.
```

## Java

```import java.util.HashSet;
import java.util.Set;

public class App {
private static int countJewels(String stones, String jewels) {
Set<Character> bag = new HashSet<>();
for (char c : jewels.toCharArray()) {
}

int count = 0;
for (char c : stones.toCharArray()) {
if (bag.contains(c)) {
count++;
}
}

return count;
}

public static void main(String[] args) {
System.out.println(countJewels("aAAbbbb", "aA"));
System.out.println(countJewels("ZZ", "z"));
}
}
```
Output:
```3
0```

## JavaScript

```(() => {

// jewelCount :: String -> String -> Int
const jewelCount = (j, s) => {
const js = j.split('');
return s.split('')
.reduce((a, c) => js.includes(c) ? a + 1 : a, 0)
};

// TEST -----------------------------------------------
return [
['aA', 'aAAbbbb'],
['z', 'ZZ']
]
.map(x => jewelCount(...x))
})();
```
Output:
`[3, 0]`

## Joy

```DEFINE jewels == [in 1 0 choice +] cons 0 swap fold.

"aAAbbbb" "aA" jewels.
"ZZ" "z" jewels.```
Output:
```3
0```

## jq

```\$ jq -n --arg stones aAAbbbb --arg jewels aA '
[\$stones|split("") as \$s|\$jewels|split("") as \$j|\$s[]|
select(. as \$c|\$j|contains([\$c]))]|length'```
Output:
`3`

## Julia

Module:

```module Jewels

count(s, j) = Base.count(x ∈ j for x in s)

end  # module Jewels
```

Main:

```@show Jewels.count("aAAbbbb", "aA")
@show Jewels.count("ZZ", "z")
```
Output:
```Jewels.count("aAAbbbb", "aA") = 3
Jewels.count("ZZ", "z") = 0```

## K

```jewels: +/~^?

jewels["aA";"aAAbbbb"]
```
Output:
`3`

## Kotlin

```// Version 1.2.40

fun countJewels(s: String, j: String) = s.count { it in j }

fun main(args: Array<String>) {
println(countJewels("aAAbbbb", "aA"))
println(countJewels("ZZ", "z"))
}
```
Output:
```3
0
```

## Lambdatalk

```{def countjewels
{def countjewels.r
{lambda {:a :b :c}
{if {A.empty? :a}
then :c
else {countjewels.r {A.rest :a}
:b
{if {= {A.in? {A.first :a} :b} -1}
then :c
else {+ :c 1}}}}}}
{lambda {:a :b}
{countjewels.r {A.split :a} {A.split :b} 0}}}
-> countjewels

{countjewels aAAbbbb aA} -> 3
{countjewels ZZ z}       -> 0
```

## Lua

Translation of: C
```function count_jewels(s, j)
local count = 0
for i=1,#s do
local c = s:sub(i,i)
if string.match(j, c) then
count = count + 1
end
end
return count
end

print(count_jewels("aAAbbbb", "aA"))
print(count_jewels("ZZ", "z"))
```
Output:
```3
0```

## MACRO-11

```        .TITLE  JWLSTN
.MCALL  .TTYOUT,.EXIT
JWLSTN::JMP     DEMO

; COUNT JEWELS R1 IN STONES R0, ANSWER IN R2
COUNT:  MOV     #200,R2         ; CLEAR JEWELS
MOV     #6\$,R3
1\$:     CLR     (R3)+
SOB     R2,1\$
BR      3\$
2\$:     MOVB    #1,6\$(R2)       ; MARK JEWELS
3\$:     MOVB    (R1)+,R2
BNE     2\$
BR      5\$
4\$:     MOVB    6\$(R1),R3       ; COUNT JEWELS IN STONES
5\$:     MOVB    (R0)+,R1
BNE     4\$
RTS     PC
6\$:    .BLKB   400

DEMO:   MOV     #TESTS,R4
1\$:     MOV     (R4)+,R1        ; READ TEST CASE
MOV     (R4)+,R0
BEQ     2\$              ; DONE?
JSR     PC,COUNT        ; COUNT
MOV     R2,R0           ; DISPLAY RESULT
.TTYOUT
MOV     #15,R0
.TTYOUT
MOV     #12,R0
.TTYOUT
BR      1\$              ; NEXT
2\$:     .EXIT

TESTS:  .WORD   1\$,2\$,3\$,4\$,0,0
1\$:     .ASCIZ  /aA/
2\$:     .ASCIZ  /aAAbbbb/
3\$:     .ASCIZ  /z/
4\$:     .ASCIZ  /ZZ/
.END    JWLSTN```
Output:
```3
0```

## Maple

```count_jewel := proc(stones, jewels)
local count, j, letter:
j := convert(jewels,set):
count := 0:
for letter in stones do
if (member(letter, j)) then
count++:
end if:
end do:
return count:
end proc:
count_jewel("aAAbbbb", "aA")```
Output:
`3`

## Mathematica / Wolfram Language

```JewelsStones[j_String, s_String] := Count[MemberQ[Characters[j], #] & /@ Characters[s], True]
JewelsStones["aA", "aAAbbbb"]
JewelsStones["ZZ", "z"]
```
Output:
```3
0```

## MATLAB / Octave

```    function s = count_jewels(stones,jewels)
s=0;
for c=jewels
s=s+sum(c==stones);
end
%!test
%! assert(count_jewels('aAAbbbb','aA'),3)
%!test
%! assert(count_jewels('ZZ','z'),0)
```

## min

Works with: min version 0.19.6
```(('' '' '') => spread if) :if?

((1 0 if?) concat map sum) :count

(swap indexof -1 !=) :member?

(("" split) dip 'member? cons count) :count-jewels

"aAAbbbb" "aA" count-jewels puts!
"ZZ" "z" count-jewels puts!```
Output:
```3
0
```

## Modula-2

```MODULE Jewels;
FROM FormatString IMPORT FormatString;

PROCEDURE WriteInt(n : INTEGER);
VAR buf : ARRAY[0..15] OF CHAR;
BEGIN
FormatString("%i", buf, n);
WriteString(buf)
END WriteInt;

PROCEDURE CountJewels(s,j : ARRAY OF CHAR) : INTEGER;
VAR c,i,k : CARDINAL;
BEGIN
c :=0;

FOR i:=0 TO HIGH(s) DO
FOR k:=0 TO HIGH(j) DO
IF (j[k]#0C) AND (s[i]#0C) AND (j[k]=s[i]) THEN
INC(c);
BREAK
END
END
END;

RETURN c
END CountJewels;

BEGIN
WriteInt(CountJewels("aAAbbbb", "aA"));
WriteLn;
WriteInt(CountJewels("ZZ", "z"));
WriteLn;

END Jewels.
```
Output:
```3
0```

## Nim

```import sequtils

func countJewels(stones, jewels: string): Natural =
stones.countIt(it in jewels)

echo countJewels("aAAbbbb", "aA")
echo countJewels("ZZ", "z")
```
Output:
```3
0```

## Objeck

Translation of: Java
```use Collection.Generic;

class JewelsStones {
function : Main(args : String[]) ~ Nil {
Count("aAAbbbb", "aA")->PrintLine();
Count("ZZ", "z")->PrintLine();
}

function : Count(stones : String, jewels : String) ~ Int {
bag := Set->New()<CharHolder>;

each(i : jewels) {
bag->Insert(jewels->Get(i));
};

count := 0;
each(i : stones) {
if(bag->Has(stones->Get(i))) {
count++;
};
};

return count;
}
}```
Output:
```3
0
```

## OCaml

```let jewels j s =
String.(fold_left (fun n c -> if contains j c then succ n else n) 0 s)
```

## Perl

```sub count_jewels {
my( \$j, \$s ) = @_;
my(\$c,%S);

\$S{\$_}++     for split //, \$s;
\$c += \$S{\$_} for split //, \$j;
return "\$c\n";
}

print count_jewels 'aA' , 'aAAbbbb';
print count_jewels 'z'  , 'ZZ';
```
Output:
```3
0```

### Alternate using regex

```#!/usr/bin/perl

use strict; # https://rosettacode.org/wiki/Jewels_and_Stones#Perl
use warnings;

sub count_jewels { scalar( () =  \$_[0] =~ /[ \$_[1] ]/gx ) } # stones, jewels

print "\$_ = ", count_jewels( split ), "\n" for split /\n/, <<END;
aAAbbbb aA
aAAbbbb abc
ZZ z
END
```
Output:
```aAAbbbb aA = 3
aAAbbbb abc = 5
ZZ z = 0
```

## Phix

```function count_jewels(string stones, jewels)
integer res = 0
for i=1 to length(stones) do
res += find(stones[i],jewels)!=0
end for
return res
end function
?count_jewels("aAAbbbb","aA")
?count_jewels("ZZ","z")
```
Output:
```3
0
```

## Picat

### List comprehension

`jewels_and_stones1(Jewels,Stones) = sum([1 : S in Stones, J in Jewels, S == J]).`

### Recursion

```jewels_and_stones2(Jewels,Stones) = N =>
jewels_and_stones2(Jewels,Stones,0,N).

jewels_and_stones2([],_Stones,N,N).
jewels_and_stones2([J|Jewels],[S|Stones],N0,N) :-
jewels_and_stones2_(J,[S|Stones],0,JN),
jewels_and_stones2(Jewels,Stones,N0+JN,N).

% Check just this jewel on all the stones
jewels_and_stones2_(_J,[],N,N).
jewels_and_stones2_(J,[S|Stones],N0,N) :-
( J == S ->
N1 = N0+1
;
N1 = N0
),
jewels_and_stones2_(J,Stones,N1,N).```

### Foreach loop

```jewels_and_stones3(Jewels,Stones) = N =>
N = 0,
foreach(J in Jewels, S in Stones)
if J == S then
N := N + 1
end
end.```

### Test

```go =>
Tests = [["aA","aAAbbbb"],
["z","ZZ"]
],
println(tests=Tests),
foreach([Jewels,Stones] in Tests)
println([jewels=Jewels,stone=Stones]),
println(js1=jewels_and_stones1(Jewels,Stones)),
println(js2=jewels_and_stones2(Jewels,Stones)),
println(js3=jewels_and_stones3(Jewels,Stones)),
nl
end,
nl.```
Output:
```tests = [[aA,aAAbbbb],[z,ZZ]]
[jewels = aA,stone = aAAbbbb]
js1 = 3
js2 = 3
js3 = 3

[jewels = z,stone = ZZ]
js1 = 0
js2 = 0
js3 = 0```

### Benchmark

For a larger test we can see the differences between the three approaches. Here are 100 000 000 random stones and (atmost) 15 jewels (we remove any duplicate jewel).

```go2 =>
Alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",
Len = Alpha.len,
_ = random2(),
NumStones = 100_000_000,
NumJewels = 15, % Atmost number of jewels (duplicates are removed)

Stones = [Alpha[random(1,Len)] : _ in 1..NumStones],
Jewels = [Alpha[random(1,Len)] : _ in 1..NumJewels].sort_remove_dups,
println(jewels=Jewels),
nl,
time(println(js1=jewels_and_stones1(Jewels,Stones))),
time(println(js2=jewels_and_stones2(Jewels,Stones))),
time(println(js3=jewels_and_stones3(Jewels,Stones))),
nl.```
Output:
```NumStones: 100_000_000  NumJewels = 15
jewels = TwurtRabSXx

js1 = 21154798

CPU time 15.087 seconds.

js2 = 21154796

CPU time 11.024 seconds.

js3 = 21154798

CPU time 11.94 seconds.```

The recursion approach (`jewels_and_stones2/2`) is a little faster than the loop approach (`jewels_and_stones/3`).

## PL/M

```100H:

/* FIND JEWELS AMONG STONES */
COUNT\$JEWELS: PROCEDURE (JEWELS, STONES) BYTE;
DECLARE (J BASED JEWELS, S BASED STONES) BYTE;
DECLARE JFLAG (256) BYTE, I BYTE;

/* ZERO JEWEL FLAGS */
DO I=0 TO 255;
JFLAG(I) = 0;
END;

/* LOOP THROUGH JEWELS AND MARK THEM */
DO WHILE J <> '\$';
JFLAG(J) = 1;
JEWELS = JEWELS + 1;
END;

/* COUNT THE JEWELS AMONG THE STONES */
I = 0;
DO WHILE S <> '\$';
I = I + JFLAG(S);
STONES = STONES + 1;
END;
RETURN I;
END COUNT\$JEWELS;

/* CP/M BDOS CALL */
BDOS: PROCEDURE (FN, ARG);
GO TO 5;
END BDOS;

PRINT: PROCEDURE (STR);
CALL BDOS(9, STR);
END PRINT;

/* NUMERIC OUTPUT */
PRINT\$NUMBER: PROCEDURE (N);
DECLARE S (4) BYTE INITIAL ('...\$');
DECLARE P ADDRESS, (N, C BASED P) BYTE;
P = .S(3);
DIGIT:
P = P-1;
C = N MOD 10 + '0';
N = N/10;
IF N > 0 THEN GO TO DIGIT;
CALL PRINT(P);
END PRINT\$NUMBER;

/* PRINT JEWELS, STONES, AND AMOUNT OF JEWELS IN STONES */
TEST: PROCEDURE (J, S);
CALL PRINT(.'''\$');
CALL PRINT(J);
CALL PRINT(.''' IN ''\$');
CALL PRINT(S);
CALL PRINT(.''': \$');
CALL PRINT\$NUMBER(COUNT\$JEWELS(J, S));
CALL PRINT(.(13,10,'\$'));
END TEST;

/* UNFORTUNATELY, THE PL/M COMPILER ACCEPTS A VERY RESTRICTED CHARACTER SET
IN THE SOURCE CODE. (IT IS THE INTERSECTION OF VARIOUS POPULAR CHARSETS
FROM THE 1960S.) THIS CHARACTER SET DOES NOT INCLUDE LOWERCASE LETTERS.
HOWEVER, THIS CODE ASSUMES THE ASCII CHARACTER SET ANYWAY.
WE CAN INCLUDE LOWERCASE LETTERS ... BY WRITING THEIR ASCII CODES.
THE OUTPUT WILL BE CORRECT OF COURSE. */

CALL TEST(.( 97,'A\$' ), .( 97,'AA',98,98,98,98,'\$' ));
CALL TEST(.( 122,'\$' ), .( 'ZZZZ\$' ));

CALL BDOS(0,0);
EOF```
Output:
```'aA' IN 'aAAbbbb': 3
'z' IN 'ZZZZ': 0```

## Prolog

```:- system:set_prolog_flag(double_quotes,codes) .

count_jewels(STONEs0,JEWELs0,COUNT)
:-
findall(X,(member(X,JEWELs0),member(X,STONEs0)),ALLs) ,
length(ALLs,COUNT)
.
```
Output:
```/*
?- count_jewels("aAAbbbb","aA",N).
N = 3.

?- count_jewels("ZZ","z",N).
N = 0.

?-  count_jewels("aAAbbbb","bcd",N) .
N = 4.

?-
*/
```

#### alternative version

Works with: SWI Prolog
```count_jewels(Stones, Jewels, N):-
string_codes(Stones, Scodes),
string_codes(Jewels, Jcodes),
msort(Scodes, SScodes),
sort(Jcodes, SJcodes),
count_jewels(SScodes, SJcodes, N, 0).

count_jewels([], _, N, N):-!.
count_jewels(_, [], N, N):-!.
count_jewels([C|Stones], [C|Jewels], N, R):-
!,
R1 is R + 1,
count_jewels(Stones, [C|Jewels], N, R1).
count_jewels([S|Stones], [J|Jewels], N, R):-
J < S,
!,
count_jewels([S|Stones], Jewels, N, R).
count_jewels([_|Stones], Jewels, N, R):-
count_jewels(Stones, Jewels, N, R).
```
Output:
```Welcome to SWI-Prolog (threaded, 64 bits, version 8.0.2)
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software.

For built-in help, use ?- help(Topic). or ?- apropos(Word).

?- count_jewels("aAAbbbb", "aA", N).
N = 3.
```

## Python

```def countJewels(s, j):
return sum(x in j for x in s)

print countJewels("aAAbbbb", "aA")
print countJewels("ZZ", "z")
```
Output:
```3
0```

### Python 3 Alternative

```def countJewels(stones, jewels):
jewelset = set(jewels)
return sum(1 for stone in stones if stone in jewelset)

print(countJewels("aAAbbbb", "aA"))
print(countJewels("ZZ", "z"))
```
Output:
```3
0```

## R

```J_n_S <- function(stones  ="aAAbbbb", jewels = "aA") {
stones <- unlist(strsplit(stones, split = "")) # obtain a character vector
jewels <- unlist(strsplit(jewels, split = ""))
count <- sum(stones %in% jewels)
}

print(J_n_S("aAAbbbb", "aA"))
print(J_n_S("ZZ", "z"))
print(J_n_S("lgGKJGljglghGLGHlhglghoIPOgfdtrdDCHnvbnmBVC", "fFgGhH"))
```
Output:
```> print(J_n_S("aAAbbbb", "aA"))
[1] 3
> print(J_n_S("ZZ", "z"))
[1] 0
> print(J_n_S("lgGKJGljglghGLGHlhglghoIPOgfdtrdDCHnvbnmBVC", "fFgGhH"))
[1] 16
```

## Quackery

```  [ 0 0 rot
witheach [ bit | ]
rot witheach
[ bit over & if
[ dip 1+ ] ]
drop ]             is j&s ( \$ \$ --> n )

\$ "aAAbbbb" \$  "aA" j&s echo```
Output:
`3`

## Racket

```#lang racket

(define (jewels-and-stones stones jewels)
(length (filter (curryr member (string->list jewels)) (string->list stones))))

(module+ main
(jewels-and-stones "aAAbbbb" "aA")
(jewels-and-stones "ZZ" "z"))
```
Output:
```3
0```

## Raku

(formerly Perl 6)

```sub count-jewels ( Str \$j, Str \$s --> Int ) {
my %counts_of_all = \$s.comb.Bag;
my @jewel_list    = \$j.comb.unique;

return %counts_of_all ∩ @jewel_list.Bag ?? %counts_of_all{ @jewel_list }.sum !! 0;
}

say count-jewels 'aA' , 'aAAbbbb';
say count-jewels 'z'  , 'ZZ';
```
Output:
```3
0```

## Red

```Red [
title: "Jewels and stones"
red-version: 0.6.4
]

count: function [
"Returns the number of values in a block for which a function returns true"
values [any-list! string!] "The values from which to count"
fn [function!] "A function that returns true or false"
][
count: 0
foreach value values [if fn value [count: count + 1]]
count
]

count-jewels: function [
"Returns the count of 'jewels' in the 'stones'"
stones "The values to search for jewels"
jewels "The values to count in the stones"
][
result: 0
foreach jewel jewels [
result: result + count stones function [stone][stone = jewel]
]
]

print count-jewels "aAAbbbb" "aA"
print count-jewels "ZZ" "z"
```
Output:
```3
0
```

## Refal

```\$ENTRY Go {
= <Prout <Jewels ('aAAbbb') ('aA')>>
<Prout <Jewels ('ZZ') ('z')>>;
};

Jewels {
() (e.Jewels)
= 0;
(s.Stone e.Stones) (e.Jewels), e.Jewels: e.X s.Stone e.Y
= <+ 1 <Jewels (e.Stones) (e.Jewels)>>;
(s.Stone e.Stones) (e.Jewels)
= <Jewels (e.Stones) (e.Jewels)>;
};```
Output:
```3
0```

## REXX

Programming note:   a check is made so that only (Latin) letters are counted as a match.

```/*REXX pgm counts how many letters (in the 1st string) are in common with the 2nd string*/
say  count('aAAbbbb', "aA")
say  count('ZZ'     , "z" )
exit                                /*stick a fork in it,  we're all done. */
/*──────────────────────────────────────────────────────────────────────────*/
count: procedure
parse arg stones,jewels  /*obtain the two strings specified.    */
number= 0                                     /*initialize number  to  zero.*/
do j=1  for length(stones)           /*scan STONES for matching JEWELS chars*/
x= substr(stones, j, 1)            /*obtain a character of the STONES var.*/
if datatype(x, 'M')  then if pos(x, jewels)\==0  then number=number + 1
end   /*j*/                    /* [↑]  if a letter and a match, bump number */
return number                        /*return the number of common letters. */
```
output   when using the default inputs:
```3
0```

## Ring

```# Project  Jewels and Stones

jewels = "aA"
stones = "aAAbbbb"
see jewelsandstones(jewels,stones) + nl
jewels = "z"
stones = "ZZ"
see jewelsandstones(jewels,stones) + nl

func jewelsandstones(jewels,stones)
num = 0
for n = 1 to len(stones)
pos = substr(jewels,stones[n])
if pos > 0
num = num + 1
ok
next
return num```

Output:

```3
0```

## RPL

Works with: Halcyon Calc version 4.2.7
```≪ → stones jewels
≪ 0 1 jewels SIZE FOR j
stones jewels j j SUB
WHILE DUP2 POS REPEAT
LAST 1 + ROT SWAP OVER SIZE SUB SWAP ROT 1 + ROT ROT
END
DROP2
NEXT
≫
≫
'JnS' STO
"aAAbbbb" "aA" JnS
"ZZ" "z" JnS
```
Output:
``` 2:3
1:0
```

## Ruby

```stones, jewels = "aAAbbbb", "aA"

stones.count(jewels)  # => 3
```

## Rust

```fn count_jewels(stones: &str, jewels: &str) -> u8 {
let mut count: u8 = 0;
for cur_char in stones.chars() {
if jewels.contains(cur_char) {
count += 1;
}
}
count
}
fn main() {
println!("{}", count_jewels("aAAbbbb", "aA"));
println!("{}", count_jewels("ZZ", "z"));
}
```

Output:

```3
0```

## Scala

```object JewelsStones extends App {
def countJewels(s: String, j: String): Int = s.count(i => j.contains(i))

println(countJewels("aAAbbbb", "aA"))
println(countJewels("ZZ", "z"))
}
```
Output:

See it in running in your browser by ScalaFiddle (JavaScript) or by Scastie (JVM).

## SETL

```program count_jewels;
show("aA", "aAAbbbb");
show("z", "ZZ");

proc show(jewels, stones);
print("'" + jewels + "' in '" + stones + "': " + count(jewels, stones));
end proc;

proc count(jewels, stones);
jewels := {j : j in jewels};
return #[s : s in stones | s in jewels];
end proc;
end program;```
Output:
```'aA' in 'aAAbbbb': 3
'z' in 'ZZ': 0```

## Sidef

```func countJewels(s, j) {
s.chars.count { |c|
j.contains(c)
}
}

say countJewels("aAAbbbb", "aA")    #=> 3
say countJewels("ZZ", "z")          #=> 0
```

## Snobol

```*       See how many jewels are among the stones
DEFINE('JEWELS(JWL,STN)')               :(JEWELS_END)
JEWELS  JEWELS = 0
JWL = ANY(JWL)
JMATCH  STN JWL = ''                            :F(RETURN)
JEWELS = JEWELS + 1                     :(JMATCH)
JEWELS_END

*       Example from the task (prints 3)
OUTPUT = JEWELS('aA','aAAbbbb')
*       Example with no jewels (prints 0)
OUTPUT = JEWELS('z','ZZ')
END
```
Output:
```3
0```

## SQL

```-- See how many jewels are among the stones
declare @S varchar(1024) 	=	'AaBbCcAa'
,	@J varchar(1024)	=	'aA';

declare @SLEN	int = len(@S);
declare @JLEN	int = len(@J);
declare @TCNT	int = 0;

declare @SPOS	int = 1;	-- curr position in @S
declare @JPOS	int = 1;	-- curr position in @J
declare @FCHR	char(1);	-- char to find

while @JPOS <= @JLEN
begin

set @FCHR = substring(@J, @JPOS, 1);

set @SPOS = 1;

while @SPOS > 0 and @SPOS <= @SLEN
begin

set @SPOS = charindex(@FCHR, @S COLLATE Latin1_General_CS_AS, @SPOS);

if @SPOS > 0 begin
set @TCNT = @TCNT + 1;
set @SPOS = @SPOS + 1;
end
end

set @JPOS = @JPOS + 1;
end
print 'J='+@J+' S='+@S+' TOTAL = '+cast(@TCNT as varchar(8));
```
Output:
```J=aA S=AaBbCcAa TOTAL = 4
```

## Swift

```func countJewels(_ stones: String, _ jewels: String) -> Int {
return stones.map({ jewels.contains(\$0) ? 1 : 0 }).reduce(0, +)
}

print(countJewels("aAAbbbb", "aA"))
print(countJewels("ZZ", "z"))
```
Output:
```3
0```

## Tcl

```proc shavej {stones jewels} {
set n 0
foreach c [split \$stones {}] {
incr n [expr { [string first \$c \$jewels] >= 0 }]
}
return \$n
}
puts [shavej aAAbbbb aA]
puts [shavej ZZ z]
```
Output:
```3
0
```

## Terraform

```variable "jewels" {
default = "aA"
}

variable "stones" {
default = "aAAbbbb"
}

locals {
jewel_list = split("", var.jewels)
stone_list = split("", var.stones)
found_jewels = [for s in local.stone_list: s if contains(local.jewel_list, s)]
}

output "jewel_count" {
value = length(local.found_jewels)
}
```
Output:
```\$ terraform apply --auto-approve

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

jewel_count = 3

\$ TF_VAR_jewels=z TF_VAR_stones=ZZ terraform apply --auto-approve

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

jewel_count = 0
```

## Transd

```#lang transd

MainModule: {
countJewels: (λ j String() st String() locals: n 0
(for s in st do
(if (contains j s) (+= n 1)))
(ret n)
),
_start: (λ (lout (countJewels "aA" "aAAbbbb"))
(lout (countJewels "b" "BB")))
}
```
Output:
```3
0
```

## V (Vlang)

Translation of: Go
```fn js(stones string, jewels string) int {
mut n := 0
for b in stones.bytes() {
if jewels.index_u8(b) >= 0 {
n++
}
}
return n
}

fn main() {
println(js("aAAbbbb", "aA"))
}```
Output:
```3
```

## Wren

Translation of: Kotlin
```var countJewels = Fn.new { |s, j| s.count { |c| j.contains(c) } }

System.print(countJewels.call("aAAbbbb", "aA"))
System.print(countJewels.call("ZZ", "z"))
```
Output:
```3
0
```

## XPL0

```string 0;       \Use zero-terminated strings

func Count(Stones, Jewels);
\Return number of letters in Stones that match letters in Jewels
char Stones, Jewels;
int  Cnt, I, J;
[Cnt:= 0;
I:= 0;
while Jewels(I) do
[J:= 0;
while Stones(J) do
[if Stones(J) = Jewels(I) then Cnt:= Cnt+1;
J:= J+1;
];
I:= I+1;
];
return Cnt;
];

[IntOut(0, Count("aAAbbbb", "aA"));  CrLf(0);
IntOut(0, Count("ZZ", "z"));  CrLf(0);
IntOut(0, Count("pack my box with five dozen liquor jugs", "aeiou"));  CrLf(0);
]```
Output:
```3
0
11
```

## zkl

`fcn countJewels(a,b){ a.inCommon(b).len() }`
```println(countJewels("aAAbbbb", "aA"));
println(countJewels("ZZ", "z"));```
Output:
```3
0```