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  1. #lang racket
  2.  
  3. (require (only-in srfi/1 zip))
  4.  
  5. (provide take-for-each)
  6.  
  7. (define (take-for-each proc pos lis1 . lists)
  8.   (if (null? lists)
  9.       (when (procedure? proc)
  10.         (let loop ((lis lis1))
  11.           (with-handlers ((exn:fail:contract?
  12.                            (lambda (exn) (void))))
  13.             (proc (take lis pos))
  14.             (loop (cdr lis)))))
  15.       (take-for-each proc pos (apply zip (cons lis1 lists)))))
Success #stdin #stdout 0.53s 73332KB
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https://ideone.com/3zMC2A
language:
Racket (racket 7.0)
created:
1 year ago
visibility:
secret

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