[ruby-core:61037] [ruby-trunk - Feature #7939] [Feedback] Alternative curry function creation

Issue #7939 has been updated by Yukihiro Matsumoto.

Status changed from Assigned to Feedback

We are not going to change the behavior of 'curry' with respect to the mathematical term currying, which origin is the famous mathematician Haskel Curry.

But we don't reject your opinion that proposed API is intuitive.  All we say is that we need new name.

Matz.
 

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Feature #7939: Alternative curry function creation
https://bugs.ruby-lang.org/issues/7939#change-45441

* Author: Kresimir Bojcic
* Status: Feedback
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Category: core
* Target version: next minor
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=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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