[gergoerdi]

Check out MagicHaskeller which figures out list processing functions from examples: http://nautilus.cs.miyazaki-u.ac.jp/~skata/MagicHaskeller.ht...

For example, given the rule `f "abcde" 2 == "aabbccddee"`, it even figures out the role of the parameter `2`, so `f "zq" 3` gives `"zzzqqq"`.