From: Florent Vaucelle <redmine@...>
Date: 2010-02-20T01:45:18+09:00
Subject: [ruby-core:28252] [Bug #2764] Hash.new inconsistency when initialized with an enumerable

Bug #2764: Hash.new inconsistency when initialized with an enumerable
http://redmine.ruby-lang.org/issues/show/2764

Author: Florent Vaucelle
Status: Open, Priority: Normal
ruby -v: ruby 1.8.7 (2009-04-08 patchlevel 160) [i686-darwin9]

When initializing a Hash with an enumerable as default value, Hash.new(obj) and Hash.new(&block) have different behaviours.

Example:
h = Hash.new([])
h[10] << 20
h #=> {}

h = Hash.new { |hash, key| hash[key] = [] }
hash[10] << 20
h #=> {10=>20}

The example similar when using a String instead of an Array as default value.


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