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By: yeah568 on Jan 11th, 2014  |  syntax: Scheme  |  size: 0.33 KB  |  hits: 42  |  expires: Never
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  1. ;; String -> Boolean
  2. ;; determines if string s begins with n
  3.  
  4. (check-expect (start-with-n? "no") true)
  5. (check-expect (start-with-n? "yes") false)
  6.  
  7. ;(define (start-with-n? s) "") ; this is the stub
  8.  
  9. ;(define (start-with-n? s) ; this is the template
  10. ;  (... s))
  11.  
  12. (define (start-with-n? s)
  13.   (string=? (substring s 0 1) "n"))
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