From: "David A. Black" <dblack@...>
Date: 2008-05-02T05:12:27+09:00
Subject: Re: Please explain nuances of ||=

Hi --

On Fri, 2 May 2008, Simon Krahnke wrote:

> * David A. Black <dblack@rubypal.com> (18:56) schrieb:
>
>> Hi --
>>
>> On Fri, 2 May 2008, Ruby Freak wrote:
>>
>>> I am reading some of the ruby files in rails and I an seeing the ||=
>>> method used a lot.
>>> knowing ruby the way I do, I realize that she has lots of magical
>>> surprises and I really want to get to know this girl!
>>
>> x ||= y means:  x || x = y
>
> No, it means: x = x || y

This is becoming a bit of a perma-thread :-)

See Robert K.'s answer, and also have a look at the blog post I
mentioned in my response. It's about exactly why x = x || y is not the
right expansion for x ||= y.


David

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