Re: [Haskell-cafe] Re: Keys and Maps [Was: Re: I just don't get it (data structures and OO)]

On 6/7/07, Grzegorz wrote:

All this hard work for something that in a lesser language would be the unimpressive: universe["Milky Way"]["Sun"] ;-P

Well, if you want to get picky there is the '!' operator defined in Data.Map:

import Data.Map

universe :: Map String (Map String String) universe = fromList [("Milky Way", fromList [("Sun", "It's home!")])]

earth :: String earth = universe ! "Milky Way" ! "Sun"

Justin