From: nobu@...
Date: 2015-09-04T23:30:31+00:00
Subject: [ruby-core:70666] [Ruby trunk - Bug #11508] Hash#eql? does not	respect hash ordering

Issue #11508 has been updated by Nobuyoshi Nakada.


New ticket for a new method, please.

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Bug #11508: Hash#eql? does not respect hash ordering
https://bugs.ruby-lang.org/issues/11508#change-54060

* Author: Eike Dierks
* Status: Closed
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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~~~ruby
{a:1,b:2}.eql?({b:2,a:1})
=> true
~~~

The `eql?` (aka `==`) operator on hashes does not compare the ordering of the compared hashes.

This behaviour is documented in `Hash#==` (and should not be touched, ever)

I'd like to suggest:

- extend the documentation of `Hash#==` to *explicitely* state, that ordering is not compared
- add a new function in ruby5 to compare hashes with respect of the ordering,
   aka `{a:1,b:2}.eql_with_order?({b:2,a:1})` => `false`














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