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The big exception is if the function passed to foldl does nothing but apply constructors to one or more of its arguments.

dfeuer
– dfeuer

2016-03-08 02:03:56 +00:00
Commented Mar 8, 2016 at 2:03
Is there a general pattern to when foldl is actually the best choice? (Like infinite lists when foldr is the wrong choice, optimization-wise.?)

anon
– anon

2018-01-07 01:42:54 +00:00
Commented Jan 7, 2018 at 1:42
@Evi1M4chine not sure what you mean by foldr being the wrong choice for infinite lists. In fact, you shouldn't use foldl or foldl' for infinite lists. See the Haskell wiki on stack overflows

KevinOrr
– KevinOrr

2020-02-06 19:51:46 +00:00
Commented Feb 6, 2020 at 19:51

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