From: "duckinator (Nick Markwell)" <nick@...>
Date: 2012-07-13T14:22:01+09:00
Subject: [ruby-core:46380] [ruby-trunk - Feature #6727] Add Array#rest (with implementation)


Issue #6727 has been updated by duckinator (Nick Markwell).


>    rest = arr.drop(1)
>    _, *rest = arr

Those two methods you mentioned "work," but the first isn't very clear on its intent, and the second cannot be used as a statement (which is where I have personally seen [1..-1] used the most). 


> See also http://bugs.ruby-lang.org/projects/ruby/wiki/HowToRequestFeatures

1. Insure it's a meaningful improvement
  * Yes, this improvement is discussed in multiple Google search results and has received positive feedback when I mentioned it elsewhere.
  * There are already ways to achieve similar results, but they don't convey their purpose well.
  * I have seen, and used arr[1..-1] countless times. Also see above statement regarding positive feedback.
2. Think about it
  * What's a good name? Array#rest
  * What exact arguments does it accept? None.
  * What does it return? A new Array.
  * Any risk of incompatibility? No.
3. Write it up
  * The title was apparently good, as it was not ignored.
  * The current situation is improved because Array#rest is clear about your intent, 
  * I made a concise but complete proposal.
  * I did not address the objection of .drop(1), because I had forgotten about it. I do hope `_, *rest = arr` was purely for demonstrative purposes.

4. Feature request already opened, with patch.



Is there any reason for this being rejected besides the existence of (({arr.drop(1)})) and your other method which (in my opinion) should not be necessary unless you're doing (({first, *rest = arr}))?

----------------------------------------
Feature #6727: Add Array#rest (with implementation)
https://bugs.ruby-lang.org/issues/6727#change-27996

Author: duckinator (Nick Markwell)
Status: Rejected
Priority: Normal
Assignee: 
Category: 
Target version: 


=begin
I run into many instances where I end up using (({arr[1..-1]})), so I decided to add (({arr.rest})) to make that a bit less hideous.

Branch on github: ((<URL:https://github.com/duckinator/ruby/compare/feature/array_rest>))

Patch: ((<URL:https://github.com/duckinator/ruby/compare/feature/array_rest.patch>))

Diff: ((<URL:https://github.com/duckinator/ruby/compare/feature/array_rest.diff>))
=end


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