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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Run-length-encoding/Racket/run-length-encoding.rkt Normal file
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#lang racket
(define (encode str)
(regexp-replace* #px"(.)\\1*" str (λ (m c) (~a (string-length m) c))))
(define (decode str)
(regexp-replace* #px"([0-9]+)(.)" str (λ (m n c) (make-string (string->number n) (string-ref c 0)))))