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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Look-and-say-sequence/Racket/look-and-say-sequence.rkt Normal file
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#lang racket
(define (encode str)
(regexp-replace* #px"(.)\\1*" str (lambda (m c) (~a (string-length m) c))))
(define (look-and-say-sequence n)
(reverse (for/fold ([r '("1")]) ([n n]) (cons (encode (car r)) r))))
(for-each displayln (look-and-say-sequence 10))