From: Heesob Park <redmine@...>
Date: 2011-01-11T15:58:33+09:00
Subject: [ruby-core:34334] [Ruby 1.9-Feature#4262][Open] {key=>val}.hash is always equal to {val=>key}.hash

Feature #4262: {key=>val}.hash is always equal to {val=>key}.hash
http://redmine.ruby-lang.org/issues/show/4262

Author: Heesob Park
Status: Open, Priority: Normal
Category: core, Target version: 1.9.x

$ irb
irb(main):001:0> {1=>2}.hash
=> -381777873
irb(main):002:0> {2=>1}.hash
=> -381777873
irb(main):003:0> {123=>"abc"}.hash
=> 661749683
irb(main):004:0> {"abc"=>123}.hash
=> 661749683

This happens for Ruby 1.8.7 and 1.9.x.

It would be better to have different hash value for {key=>val} and {val=>key} .


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