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wiki-exceptions added by rwinkler on Sat May 5 19:12:21 2012

(handle-exceptions exn 
	    (cond
	     ((eq? exn 'one) 1)
	     (else (abort exn)))
  (case (random 3)
   [(0) 'zero]
   [(1) (abort 'one)]
   [else (abort "Something else")]))
;=> 'zero, 1, or (abort "Something else")
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What's the procedure to access a character in a string by index in R5RS?
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