From: "nobu (Nobuyoshi Nakada)" <nobu@...>
Date: 2013-02-24T23:20:00+09:00
Subject: [ruby-core:52831] [ruby-trunk - Feature #7939][Rejected] Alternative curry function creation


Issue #7939 has been updated by nobu (Nobuyoshi Nakada).

Description updated
Status changed from Open to Rejected

=begin
 fb = ->(modulo_number, message, x) { message if x % modulo_number == 0 }.curry(3)
 fizzbuzz = fb[15,"FizzBuzz"]
 fizz = fb[3, "Fizz"]
 buzz = fb[5, "Buzz"]
 (1..100).each { |i| puts fizzbuzz[i] || fizz[i] || buzz[i] || i }
=end

----------------------------------------
Feature #7939: Alternative curry function creation
https://bugs.ruby-lang.org/issues/7939#change-36936

Author: drKreso (Kresimir Bojcic)
Status: Rejected
Priority: Normal
Assignee: 
Category: 
Target version: 


=begin
I really like the new "(({assuming}))" method used for currying in Perl 6.

For example if I loose my mind and implement ((%fizzbuzz%)) via currying I can do it like this:

  fb = ->(modulo_number, message, x) { message if x % modulo_number == 0 }
  fizzbuzz = fb.curry[15,"FizzBuzz"]
  fizz = fb.curry[3, "Fizz"]
  buzz = fb.curry[5, "Buzz"]
  (1..100).each { |i| puts fizzbuzz[i] || fizz[i] || buzz[i] || i }

Here the first hurdle is that curry is somewhat mathematical, and the secons is that you need to use (({[]})) for function invoking...
If we had something similar to this:

  class Proc
    def assuming(*args)
      curry.call *args
    end
  end

It could be written more naturally IMO:

  fb = ->(modulo_number, message, x) { message if x % modulo_number == 0 }
  fizzbuzz = fb.assuming(15,"FizzBuzz")
  buzz = fb.assuming(5, "Buzz")
  fizz = fb.assuming(3,"Fizz")

  (1..100).each { |i| puts fizzbuzz[i] || fizz[i] || buzz[i] || i }
=end



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