From: "yhara (Yutaka HARA)" <redmine@...>
Date: 2012-10-25T19:36:06+09:00
Subject: [ruby-core:48254] [ruby-trunk - Feature #6817] Partial application


Issue #6817 has been updated by yhara (Yutaka HARA).

Target version changed from 2.0.0 to next minor


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Feature #6817: Partial application
https://bugs.ruby-lang.org/issues/6817#change-31532

Author: citizen428 (Michael Kohl)
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: next minor


=begin

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

 (1..3).map(&2.method(:+))

one could just write

 (1..3).map(&2.+) 

which I think has a quite rubyish feel to it. I have a POC implementation in Ruby (I tried it with various Fixnum methods) over at my blog (((<URL:http://citizen428.net/blog/2012/07/30/ruby-left-section-for-infix-operators>))), 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.
=end


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