From: "David A. Black" <dblack@...>
Date: 2009-08-27T06:23:01+09:00
Subject: Re: ||= with 1.8 and 1.9 ?

Hi --

On Thu, 27 Aug 2009, brabuhr@gmail.com wrote:

> On Wed, Aug 26, 2009 at 3:46 PM, Rick DeNatale<rick.denatale@gmail.com> wrote:
>> Right, the question is why in Ruby 1.9 is using the 'not a test'
>> returned from the setter method in the case of ||= unlike Ruby 1.8.x
>> and like itself in the = case:
>
> According the rubyspec project:
>
>  language/variables_spec.rb:
>    describe "Operator assignment 'var op= expr'" do
>      it "is equivalent to 'var = var op expr'" do

It isn't, though, at least in the ||= case (see Joel W.'s post).
Matz's characterization of it to me at RubyConf (or somewhere) was:

   x ||= y   same as    x || x = y


David

-- 
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