A non-recursive solution, 138 characters, and doesn't suffer from problems with repeated elements. 
#!/usr/bin/perl -w 
use strict; 
use Data::Dumper; 

my @b = p( 1, 2, 3 ); 
print Dumper( @b ); 

sub p { 
  my@a=[];for(0..@_){@a=map{my@b=@$_;my@c=@_;for(@b){my$e=$_;for(1..@c
+){my$d=shift@c;last if$d eq$e;push @c,$d}}@c?map{[@b,$_]}@c:[@b]}@a}@
+a
}

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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain

In reply to Re: (Golf) Per Mutations by Masem
in thread (Golf) Per Mutations by MeowChow

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