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  1. ; leftpad
  2.  
  3. (define (leftpad str len ch)
  4.   (let loop ((n (- len (string-length str)))
  5.              (prefix (list)))
  6.     (if (positive? n)
  7.         (loop (- n 1) (cons ch prefix))
  8.         (string-append (list->string prefix) str))))
  9.  
  10. (display (leftpad "hello" 7 #\@)) (newline)
Success #stdin #stdout 0.03s 8656KB
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Standard input is empty
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@@hello
https://ideone.com/zPY6S6
language:
Scheme (guile 2.2.4)
created:
8 years ago
visibility:
public

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