[Haskell-beginners] question about list processing

akash g akaberto at gmail.com
Thu Nov 12 13:41:11 UTC 2015

map is specialized for lists while fmap is for any functors.  Its presence
is historical.  Prefer fmap over map.

On Thu, Nov 12, 2015 at 7:03 PM, Dennis Raddle <dennis.raddle at gmail.com>

> Just after I posted that question, I started driving home, and on the
> drive I thought of your answer. I think I'm starting to ask the right
> questions when I'm programming in Haskell. Like redundancy and bloat is a
> sure sign that a more witty expression is available, and that I should
> consult the typeclasses.
> Second, I am not used to the implications of laziness, so it took me a
> while to hit on your solution because I keep thinking you have to map
> something over the whole list, and that if you only want to map it over the
> head, you are stuck.
> You can use 'map' also, instead of 'fmap', right? Is 'map' just 'fmap' for
> lists?
> D
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