From: Martin DeMello <martindemello@...>
Date: 2008-06-12T06:12:06+09:00
Subject: Re: ||=

On Wed, Jun 11, 2008 at 1:59 PM, Justin To <tekmc@hotmail.com> wrote:
> what does ||= do?

a ||= b is shorthand for a = a || b

|| is the "or" operator - a || b evaluates to a unless a is nil or
false, in which case it evaluates to b

a ||= b is most commonly used to say "if a hasn't already been set
(and is therefore nil), set it to b, else leave it alone"

martin