2008/9/8 Jefferson Heard :

I suppose a

mapM_ monadicFunction . Data.IntMap.toList $ m

doesn't work for you?

Well, that's what I use (IntMap.elems in fact), but isn't there some perfromance lost ? Thu

On Mon, Sep 8, 2008 at 2:11 PM, minh thu wrote:

...

Hi,

Is there something like a fmapM_ ? In particular, I'd like to mapM_ a Data.IntMap instead of a List

Thank you, Thu _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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On Mon, Sep 08, 2008 at 08:56:26PM +0200, Chaddaï Fouché wrote:

Unfortunately Data.IntMap don't provide an instance for IntMap (though Data.Map does for Map).

It was an oversight. The instance is straightforward: instance Traversable IntMap where traverse _ Nil = pure Nil traverse f (Tip k v) = Tip k <$> f v traverse f (Bin p m l r) = Bin p m <$> traverse f l <*> traverse f r