[racket] a small programming exercise

From: Vincent St-Amour (stamourv at ccs.neu.edu)
Date: Thu Oct 14 13:10:42 EDT 2010

At Thu, 14 Oct 2010 13:56:16 -0300,
namekuseijin wrote:
> (all-d     (filter ns (lambda (n)      (char=? n d))))
> (all-but-d (filter ns (lambda (n) (not (char=? n d))))))

Sounds like a job for partition.

http://doc.racket-lang.org/reference/pairs.html?q=partition#%28def._%28%28lib._racket/list..rkt%29._partition%29%29

Vincent


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