Andrew Savige wrote:
Haskell beginner using GHC. Hello there!
How about, opTable = [ ("+", (+)) , ("-", (-)) ... ] myeval x y op = let Just fun = lookup op opTable in x `fun` y ?
I have a function to do some simple arithmetic at run time:
myeval :: Int -> Int -> String -> Int myeval x y "+" = (+) x y myeval x y "-" = (-) x y myeval x y "*" = (*) x y -- ...
While that works, I'm curious to know if it can be done more elegantly. I'm thinking of something like:
myeval :: Int -> Int -> String -> Int myeval x y op = (read op) x y
Thanks, /-\
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