[Haskell-cafe] Haskell and symbolic references

[Jake McArthur]

Patrick LeBoutillier wrote:
> Hi all,
> 
> Is it possible with Haskell to call a function whose name is contained
> in a String?
> Something like:
> 
> five = call_func "add" [2, 3]

You could use Data.Map:

     call_func = (funcMap !)
         where funcMap = fromList [ ("add", add)
                                  , ("sub", sub)
                                  , ("mul", mul)
                                  , ("div", div)]

Or a version using lookup instead of (!) if you aren't sure that the 
string will be a valid function name.

- Jake