Feature #6817

Updated by nobu (Nobuyoshi Nakada) almost 5 years ago


I know that what I propose here is a significant change to Ruby, but it's part of my ongoing quest to get some more functional programming features into Ruby (see also #4539 and #6373).

I was wondering if it would make sense to maybe introduce partial application to Ruby? So that instead of


(1..3).map { |i| i + 2 }

or the somewhat unwieldy



one could just write



which I think has a quite rubyish feel to it. I have a POC implementation in Ruby (I tried it with various `Fixnum` Fixnum methods) over at [my blog](, my blog (((<URL:>))), but that was just a quick hack and obviously I don't want to monkey-patch every method with arity 1, but it was a nice way of exploring possible syntax.