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A comment on Racket is 25. Parent comment

Re:Racket is 25 by soegaard on Sunday May 10, 2020 @04:37PM (#23135947)
FWIW there is of course pattern matching in Racket. The program is practically identical to the Haskell version.

    (define (concast as bs)
        (match as
           ['()         bs]
           [(cons a as) (cons a (concat as bs))]))
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