[Haskell-cafe] Function call by string

[Philipp Volgger]

Hello everybody!
Can me somebody say how I can call a function by string? Thus I want to 
have a function that has as argument a string (name of a function to 
call) and then tries to call that function, a kind of:

functionCall :: String -> [String] -> RetVal
functionCall functionName arguments = ...

Thanks