From: "marcandre (Marc-Andre Lafortune)" <ruby-core@...>
Date: 2012-11-27T14:39:26+09:00
Subject: [ruby-core:50199] [ruby-trunk - Feature #6499] Array::zip


Issue #6499 has been updated by marcandre (Marc-Andre Lafortune).


I've thought a bit about this, and the proposed `Array.zip` basically already exists if all arrays have the same length.

It's called `Array#transpose` :-)

    Array.zip([1,2,3], [4,5,6]) == [[1,2,3], [4,5,6]].transpose

Note that the case of `Array.zip()` could be debated, but, as explained in https://bugs.ruby-lang.org/issues/6852, `[]` == `[].transpose` is the best answer.

Because of this, it seems there is a lesser need for `Array.zip`.

On the other hand, I am still confident that `Array.product` or similar, would be helpful. I hope I won't offend anyone by opening a new request.
----------------------------------------
Feature #6499: Array::zip
https://bugs.ruby-lang.org/issues/6499#change-34009

Author: prijutme4ty (Ilya Vorontsov)
Status: Rejected
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: 2.0.0


Sometimes it's more natural to have Array::zip rather than Array#zip. Otherwise first array of list became unnecessary dedicated
For example 
cols = first_row.zip(second_row,third_row,fourth_row)
have more natural analog:
cols = Array.zip(first_row,second_row,third_row,fourth_row)

Implementation is obvious:
def Array.zip(first,*rest)
  first.zip(*rest)
end


-- 
http://bugs.ruby-lang.org/