yes I agree. It seems to be mentioned here too http://www.haskell.org/haskellwiki/Parameter_order
On Wed, Apr 8, 2009 at 12:38 AM, Henning Thielemann < [email protected]> wrote: > > On Wed, 8 Apr 2009, Peter Verswyvelen wrote: > > These functions have their arguments reversed when compare to e.g. Map >> For example >> >> Data.HashTable.lookup :: HashTable key val -> key -> IO (Maybe val) >> >> Data.Map.lookup :: Ord key => key -> Map key val -> Maybe val >> > > For my taste, Data.Map.lookup has the wrong parameter order, since I often > need the same Map with different keys and not vice versa. The > HashTable.lookup parameter order can also be read as mapping a Map to the > function it represents. I mean (HashTable key val) and (Map key val) > represent functions of type (key -> val) and you can write: > Data.HashTable.lookup :: HashTable key val -> (key -> IO (Maybe val)) > > http://www.haskell.org/haskellwiki/Parameter_order
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