Should foldl' be added to the post-"Plan FTP" Prelude

David Feuer david.feuer at
Thu Feb 26 12:30:29 UTC 2015

No, that is not a way now that we have FTP.

On Wed, Feb 25, 2015 at 7:31 PM, Kazu Yamamoto <kazu at> wrote:
>> I would love to have foldl' as part of the Prelude. I use it quite
>> frequently and it seems like a beginner trap to have foldl but not foldl'
>> (which is almost always the better choice). I see that foldMap has been
>> added (in addition to all of Monoid and Traversable), why was foldl' left
>> out?
> That is one way but I think another way is to make foldl strict:
> I'm tired of explaining the difference of foldl and foldl' to
> beginners. :-)
> --Kazu
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