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  1. ; first word
  2.  
  3. (define (string-index c str)
  4.   (let loop ((ss (string->list str)) (k 0))
  5.     (cond ((null? ss) #f)
  6.           ((char=? (car ss) c) k)
  7.           (else (loop (cdr ss) (+ k 1))))))
  8.  
  9. (define (first-word str)
  10.   (substring str 0 (string-index #\space str)))
  11.  
  12. (display (first-word "abcdefg hijklmnop qrs tuv wxyz"))
Success #stdin #stdout 0.01s 50288KB
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stdin
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Standard input is empty
stdout
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abcdefg
https://ideone.com/tfoYDE
language:
Scheme (guile 2.2.4)
created:
5 years ago
visibility:
public

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