Jay Parlar <[EMAIL PROTECTED]> wrote:
> For instance, say you have the list ['A','B',C','D'], and you want
> all possible TWO letter permutations.
$ dict permutation
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Permutation \Per`mu*ta"tion\ (p[~e]r`m[-u]"t[=a]"sn[u^]n), n.
[...]
2. (Math.)
(a) The arrangement of any determinate number of things,
as units, objects, letters, etc., in all possible
orders, one after the other; -- called also
{alternation}. Cf. {Combination}, n., 4.
> Do you want the result to be:
> AB, AC, AD, BC, BD, CD
That is the complete set of combinations of the letters.
> Or, do you want AB,BA,AC,CA,AD,DA,BC,CB,BD,DB,CD,DB ?
That is the complete set of permutations of the letters.
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Ben Finney
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