From: ara.t.howard@...
Date: 2007-03-12T14:07:01+09:00
Subject: Re: #define alternative for Ruby

On Mon, 12 Mar 2007, Michael Strelnikov wrote:

>> I would be interested in hearing what you want to do with text substitution
>> that you cannot already do with standard Ruby metaprogramming techniques.
>> 
>> 
> Easy.
> Let's we have following function:
> * set_default(var, val)
> -- if variable "var" is not defined (not existed) then assign value "val"
> else do nothing.
>
> The variable could be ANY type including "Fixnum".
>
> Try to implement it using standard techniques.

     harp:~ > cat a.rb
     unless defined? var
       var = 42
     end

     p var


     harp:~ > ruby a.rb
     42


-a
-- 
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