[Haskell-cafe] Re: foldl vs foldl'

Achim Schneider barsoap at web.de
Thu Nov 6 03:15:56 EST 2008

Derek Elkins <derek.a.elkins at gmail.com> wrote:

> On Wed, 2008-11-05 at 10:01 -0800, Daryoush Mehrtash wrote:
> > Lets assume we don't have undefined in the list, are there functions
> > (or properties in the function) that would cause foldl to have
> > different results than foldl'?
> The only difference in the definition of foldl and foldl' is a seq so
> it can only differ due to bottoms as far as semantics is concerned.
Denotational semantics that is, isn't it?

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