On Feb 13, 2011, at 7:42 PM, Xiaojian Wang wrote: > I want to make a permutation of a word, for example 1 2 3 > > it should return > 1 2 3 > 1 3 2 > 2 1 3 > 2 3 1 > 3 1 2 > 3 2 1 > > or > (list (list 1 2 3) > (list 1 3 2) > . > . > .
This is one of my favorite homework problems. It really separates the students who have learned the Design Recipe from those who haven't. Which are you? :-) Stephen Bloch [email protected]
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