From: Ryan Davis <ryand-ruby@...>
Date: 2010-02-19T17:09:38+09:00
Subject: Re: Ruby conditionals subtlety?


On Feb 18, 2010, at 17:48 , Farhad Farzaneh wrote:

> Ryan Davis wrote:
>> On Feb 18, 2010, at 16:04 , Farhad Farzaneh wrote:
>> 
>>>> yet, and hasn't affected the lookup tables.
>>> value.  As such, if we're ever going to use defined? as a conditional, 
>>> it should precede any other mention of the token (foo).
>> 
>> I should also point out: almost all of this is of no consequence. You 
>> almost never use defined? on a local variable like this. You usually use 
>> it on a const, ivar, cvar, or global, and all of those are unambiguous.
> 
> Thanks.  I sometimes use it in Rails partials rendering, where I may 
> pass an optional local variable, but if it isn't passed, I want to set 
> it to some default value.  Perhaps there's a better way of doing this...

var ||= default