From: "matz (Yukihiro Matsumoto)" <matz@...>
Date: 2012-03-28T01:12:40+09:00
Subject: [ruby-core:43766] [ruby-trunk - Feature #5574][Rejected] Make arrays comparable


Issue #5574 has been updated by matz (Yukihiro Matsumoto).

Status changed from Assigned to Rejected

Since arrays are not always compatible, I don't want to give wrong implication by making arrays comparable.
Adding <=> was a realistic compromise for me to allow array sorting.

Matz.

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Feature #5574: Make arrays comparable
https://bugs.ruby-lang.org/issues/5574#change-25275

Author: tokland (Arnau Sanchez)
Status: Rejected
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: 


Why are arrays not comparable? _Array_ already defines _<=>_, so it seems only natural to mix-in the _Comparable_ module.

<pre>
> [1, 2] < [1, 1] 
NoMethodError: undefined method `<' for [1, 2]:Array

> Array.send(:include, Comparable)
> [1, 2] < [1, 1] 
=> false
</pre>

This was already discussed in the mailing list a while ago and people agreed it would be useful:

http://www.ruby-forum.com/topic/76535


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