From: Jano Svitok <jan.svitok@...>
Date: 2008-03-10T20:04:42+09:00
Subject: Re: newbie question

On Mon, Mar 10, 2008 at 11:50 AM, Farrel Lifson <farrel.lifson@gmail.com> wrote:
> On 10/03/2008, Frantisek Psotka <frantisek.psotka@matfyz.cz> wrote:
>  > is in ruby operator for:
>  >
>  >  a = b if b
>  >
>  >  a (operator) b
>
>  a ||= b
>
>  Farrel

a ||= b   is

a = a || b
that is
a = b if !a
that is
a = b unless a

It is equal to "a = b if b" if both a and b are of boolean type
(doesn't work for e.g. numbers).