Re: [Haskell-cafe] how can I select all the 3-element-combination out of a list efficiently

What I meant is this: http://en.wikipedia.org/wiki/Combinatorics#Combination_without_repetition the order does not matter and each object can be chosen only once. But thank all those who have offered help, it helps a lot ;) -- View this message in context: http://www.nabble.com/how-can-I-select-all-the-3-element-combination-out-of-... Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.