From: Chris Morris <redmine@...>
Date: 2009-02-26T02:30:00+09:00
Subject: [ruby-core:22472] [Bug #1210] Array behavior for minus/uniq is not as expected for hash elements

Bug #1210: Array behavior for minus/uniq is not as expected for hash elements
http://redmine.ruby-lang.org/issues/show/1210

Author: Chris Morris
Status: Open, Priority: Normal
Category: core, Target version: Ruby 1.8.6
ruby -v: ruby 1.8.6 (2008-03-03 patchlevel 114) [i686-darwin9.3.0]

Array#- does not remove an element of type hash (line 8):
irb(main):001:0> a = {}
=> {}
irb(main):002:0> b = {}
=> {}
irb(main):003:0> c = []
=> []
irb(main):004:0> a == b
=> true
irb(main):005:0> c << a
=> [{}]
irb(main):006:0> c.index(a)
=> 0
irb(main):007:0> c.index(b)
=> 0
irb(main):008:0> c - [b]
=> [{}]
irb(main):009:0> c - [a]
=> []

Array#uniq does not remove an element of type hash (line 7):
irb(main):001:0> a = {}
=> {}
irb(main):002:0> b = {}
=> {}
irb(main):003:0> c = []
=> []
irb(main):004:0> a == b
=> true
irb(main):005:0> c << a
=> [{}]
irb(main):006:0> c << b
=> [{}, {}]
irb(main):007:0> c.uniq
=> [{}, {}]


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