[Haskell-cafe] Re: Numeric type classes

[Henning Thielemann]

On Wed, 13 Sep 2006 ajb at spamcop.net wrote:

> G'day all.
> 
> Quoting Henning Thielemann <lemming at henning-thielemann.de>:
> 
> > ... which got the same name, too, namely 'foldl'.
> 
> You mean foldr.  The place of foldl is a bit tricky, but in this case
> it requires that the monoid be Abelian.

A monoid operation is associative, isn't it?