Re: [Haskell-cafe] Applying Data.Map

9 Jun 2009

      In the import statements, it wasn't clear to me that I could import types as well as functions, and Map is a type. All clear now.

Thanks.

Michael

--- On Tue, 6/9/09, Thomas ten Cate  wrote:

From: Thomas ten Cate 
Subject: Re: [Haskell-cafe] Applying Data.Map
To: "michael rice" 
Cc: haskell-cafe@haskell.org
Date: Tuesday, June 9, 2009, 9:40 AM

On Tue, Jun 9, 2009 at 15:23, michael rice wrote:
...
import Data.Map (Map)   (fromList,!)  ???
import qualified Data.Map as Map  (fromList,!) ???
Because ! is an operator, you need to enclose it in parentheses. Also,
the (Map) in the import is already the list of things you are
importing; you can just add to that. So do the following:

Import these without qualification:
...
import Data.Map (Map, fromList, (!))
Import everything else (actually including Map, fromList and (!)) with
qualification "Map":
import qualified Data.Map as Map
Cheers,

Thomas