reduce -> fold?

[Xinok via Digitalmars-d]

On Saturday, 30 January 2016 at 12:11:37 UTC, Ola Fosheim Grøstad 
wrote:
> Currying is pointless, I believe Swift is removing it. ...

It might be fairly useless in D but it's definitely not useless 
in general. It' a different design pattern and functional 
languages make great use of it. OTOH, D substitutes it with other 
design patterns like UFCS and template arguments, e.g. 
arr.sort!"a > b".

Phobos even has a function which mimics currying via 
std.functional.partial:

https://dlang.org/phobos/std_functional.html#partial