From: Daniel Schierbeck <daniel.schierbeck@...>
Date: 2006-07-26T05:00:13+09:00
Subject: Re: Defining a method with an argument with a default value

Daniel DeLorme wrote:
> Daniel Schierbeck wrote:
>> First of all, you don't need the `if value' part -- when Ruby sees 
>> @value, it is immediately created, with the value nil
> 
> Sorry for being pedantic but this is not quite true (although in this
> case it doesn't make a difference):
> 
> irb(main):001:0> @a = 1 if false
> => nil
> irb(main):002:0> b = 2 if false
> => nil
> irb(main):003:0> @c = nil
> => nil
> irb(main):004:0> defined? @a
> => nil
> irb(main):005:0> defined? b
> => "local-variable"
> irb(main):006:0> defined? @c
> => "instance-variable"

I know, but I was trying to simplify the problem :)


Cheers,
Daniel