From: Lloyd Linklater <lloyd@2live4.com>
Date: 2008-09-20T00:48:12+09:00
Subject: Re: Preserve insert order in a Hash

Pe単a, Botp wrote:
> From: Me Me [mailto:emanuelef@tiscali.it]
> # I would like to know if it's possible to insert values in a Hash and
> # then extract all of them in the same insertion order.
> 
> only in ruby 1.9

Well, that is not *entirely* true.

h={}
p h
h[1]=1
p h
h[2]=1
p h
h[3]=1
p h
h
p h
h[1.5]=1
p h
h
p h
h[0]=1
p h
h
p h

yields:

{}
{1=>1}
{1=>1, 2=>1}
{1=>1, 2=>1, 3=>1}
{1=>1, 2=>1, 3=>1}
{1=>1, 2=>1, 3=>1, 1.5=>1}
{1=>1, 2=>1, 3=>1, 1.5=>1}
{1=>1, 2=>1, 3=>1, 1.5=>1, 0=>1}
{1=>1, 2=>1, 3=>1, 1.5=>1, 0=>1}


in JRUBY 1.1 which I am running on windows under netbeans.
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