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  1. #lang racket
  2.  
  3. (require (only-in srfi/1 zip))
  4.  
  5. (provide map-take)
  6.  
  7. (define (map-take f pos lis1 . lists)
  8.   (if (null? lists)
  9.       (when (procedure? f)
  10.         (let loop ((lis lis1) (acc '()))
  11.           (with-handlers ((exn:fail:contract?
  12.                            (lambda (exn) (reverse acc))))
  13.             (loop (cdr lis) (cons (f (take lis pos)) acc)))))
  14.       (map-take f pos (apply zip (cons lis1 lists)))))
  15.  
  16.  
Success #stdin #stdout 0.6s 75084KB
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https://ideone.com/UHTU7v
language:
Racket (racket 7.0)
created:
1 year ago
visibility:
secret

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