<br><div class="gmail_quote">On Fri, Oct 26, 2012 Alex Stangl wrote:<br><pre>><i> </i>
> combos [] = [[]]
> combos ([]:ls) = combos ls
> combos ((h:t):ls) = map (h:) (combos ls) ++ combos (t:ls)
><br><br>Excellent, thanks!<br></pre></div>