On Saturday, 18 March 2017 at 11:09:34 UTC, Russel Winder wrote:
> Is this foldr or foldl' ?

It's a left fold of course, having foldr by default in eager language would be awkward.

On Sat, 2017-03-18 at 11:38 +0000, thedeemon via Digitalmars-d-learn wrote:
> On Saturday, 18 March 2017 at 11:09:34 UTC, Russel Winder wrote:
> > Is this foldr or foldl' ?
> 
> It's a left fold of course, having foldr by default in eager language would be awkward.

I would expect foldl, but there is no "of course" of the semantics of fold (or reduce) with any library. People have been known to implement the wrong thing.

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