Haskell combinations and permutation

Question

I have three word in a list [\"a\",\"b\",\"c\"]. i want to find all possible combination in set 5,6 etc.

for example for set of 5 i would have

**[ [a         


        

Answer 1

replicateM does what you want:

> import Control.Monad
> replicateM 5 ["a", "b", "c"]
[["a","a","a","a","a"],["a","a","a","a","b"],["a","a","a","a","c"],["a","a","a","b","a"],["a","a","a","b","b"],["a","a","a","b","c"],["a","a","a","c","a"],["a","a","a","c","b"],["a","a","a","c","c"],["a","a","b","a","a"],["a","a","b","a","b"],["a","a","b","a","c"],["a","a","b","b","a"],["a","a","b","b","b"],["a","a","b","b","c"]...]