Anonymous user
Set puzzle: Difference between revisions
→{{header|Racket}}
(Removed the buggy second D version) |
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green one diamond solid
red three oval solid</pre>
=={{header|Racket}}==
<lang Racket>
#lang racket
(struct card [bits name])
(define cards
(for/list ([C '(red green purple )] [Ci '(#o0001 #o0002 #o0004)]
#:when #t
[S '(oval squiggle diamond)] [Si '(#o0010 #o0020 #o0040)]
#:when #t
[N '(one two three )] [Ni '(#o0100 #o0200 #o0400)]
#:when #t
[D '(solid open striped)] [Di '(#o1000 #o2000 #o4000)])
(card (bitwise-ior Ci Si Ni Di) (format "~a, ~a, ~a, ~a" C S N D))))
(define (nsubsets l n)
(cond [(zero? n) '(())] [(null? l) '()]
[else (append (for/list ([l2 (nsubsets (cdr l) (- n 1))])
(cons (car l) l2))
(nsubsets (cdr l) n))]))
(define (set? cards)
(regexp-match? #rx"^[1247]*$"
(number->string (apply bitwise-ior (map card-bits cards)) 8)))
(define (deal C S)
(define hand (take (shuffle cards) C))
(define 3sets (filter set? (nsubsets hand 3)))
(cond [(not (= S (length 3sets))) (deal C S)]
[else (printf "Dealt ~a cards:\n" C)
(for ([c hand]) (printf " ~a\n" (card-name c)))
(printf "\nContaining ~a sets:\n" S)
(for ([set 3sets])
(for ([c set]) (printf " ~a\n" (card-name c)))
(newline))]))
(deal 9 4)
(deal 12 6)
</lang>
=={{header|Tcl}}==
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