[Haskell-cafe] Applying Data.Map

Thomas ten Cate ttencate at gmail.com
Tue Jun 9 09:40:54 EDT 2009

On Tue, Jun 9, 2009 at 15:23, michael rice<nowgate at yahoo.com> 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



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