From: "shugo (Shugo Maeda)" <redmine@...>
Date: 2013-02-08T14:25:21+09:00
Subject: [ruby-core:52027] [ruby-trunk - Bug #7768][Open] Inherited Array class missing


Issue #7768 has been updated by shugo (Shugo Maeda).

Status changed from Closed to Open
Assignee changed from charliesome (Charlie Somerville) to mame (Yusuke Endoh)

I believe r39004 should be reverted.

Matz said "If a method is originally defined in Enumerable, i.e. its return value (Array) is a collection of values from enumerable." at http://bugs.ruby-lang.org/issues/4136#note-7.
However, Array#sort returns an instance of a subclass of Array, by r39004.

  $ ./ruby -ve 'class Foo < Array; end; p Foo[2,1,3].sort.class'
  ruby 2.0.0dev (2013-02-08 trunk 39154) [i686-linux]
  Foo

I'm not sure Matz is right.  What should Array#uniq return if Enumerable#uniq is added in the future?

Anyway, there is no enough time to discuss details, so r39004 should be reverted.
Haste makes waste.
If this issue is regarded as a bug, not as a spec change, it can be fixed after the release of 2.0.0.

----------------------------------------
Bug #7768: Inherited Array class missing
https://bugs.ruby-lang.org/issues/7768#change-36041

Author: england (Roman Ivanilov)
Status: Open
Priority: Normal
Assignee: mame (Yusuke Endoh)
Category: 
Target version: 2.0.0
ruby -v: 1.9


=begin
Hello. I apologize if I missed something.
I found strange behavior in ruby 1.9:

 class Custom < Array; end
 Custom.new(0){|i| i + 1}.uniq.class # => Array
 Custom.new(2){|i| i + 1}.uniq.class # => Custom

while in 1.8 it works just as I expected. 

 class Custom < Array; end
 Custom.new(0){|i| i + 1}.uniq.class # => Custom
 Custom.new(2){|i| i + 1}.uniq.class # => Custom

* it is actual not only for the uniq method.
* tested with ree-1.8.7-2010.02, ruby-1.9.2-p290, ruby-1.9.3-p375, ruby-1.9.3-p125

Any bug here?

=end


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