Hi, This is kind-of related to my earlier question on looking up functions by name. Suppose I have a module with a number of functions with the same signature: scale :: Int -> Int -> Int scale s x = s * x add :: Int -> Int -> Int add a x = a + x ... I'd like to choose and run one of these functions randomly at run time. I can see I could use some kind of case expression: op :: Int -> Int -> Int op p x = case random(1,2) of 1 -> scale p x 2 -> add p x Or some kind of pattern guards: op p x | random(1,2) == 1 = scale p x | otherwise = add p x Although that method won't work as is for more than two choices. Are these methods the most idiomatic way of randomly choosing a function? How hard would it be to use the machinery of the QuickCheck library for this, given it must be doing something similar in test suites? Thanks, Stu