Re: [Haskell-cafe] instance for (Show ([(String, Int)] -> Int))

On Saturday 25 December 2010 00:32:38, Aaron Gray wrote:

Okay great, works this end too, but what does the 'flip' do ???

It flips the order of arguments to calc. You could also write main = getContents >>= print . (`calc` []) . lexer Generally, flip f = \x y -> f y x or flip f x = \y -> f y x flip f x y = f y x