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By: a guest on May 2nd, 2012  |  syntax: None  |  size: 0.11 KB  |  hits: 11  |  expires: Never
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  1. def qs(l)
  2.   return [] if (x,*xs=l).empty?
  3.   less, more = xs.partition{|y| y < x}
  4.   qs(less) + [x] + qs(more)
  5. end