From: phlip <phlip2005@...>
Date: 2008-07-14T20:35:29+09:00
Subject: Re: #define like with ruby

Jyri Vesalainen wrote:
> My code snippet looks like:
> ..
> testdata[current_line + 1] ...
> ..
> 
> I would like to replace current_line + 1
> with something more desciptive like NEXT_LINE.
> 
> In C I would do:
> #define NEXT_LINE current_line + 1

Just a C tip: I thought C supported global constants, enums, and inline 
functions. Never use #define if you have any alternative. And if you do, put 
parens around (current_line + 1), to avoid conflicts in operator precedence.

> Is there something similar like #define in Ruby ?

(Roughly) everything beginning with a capital letter is a constant.

Make @current_line into an instance variable of your current object, and use:

   def next_line
     @current_line + 1
   end

But there are far better ways to iterate a Ruby array...

-- 
   Phlip