From: dblack@...
Date: 2006-11-12T21:50:29+09:00
Subject: Re: Can Ruby do this magic... elegantly

Hi--

On Sun, 12 Nov 2006, Robert Klemme wrote:

> J2M wrote:
>> I would like to be able to be able to include instance methods of a
>> Struct into a class. e.g.
>> 
>> foo = Struct.new(:attribute, :another_attribute)
>> bar = foo.new
>> 
>> class Bas
>>
>>   some_ruby_magic
>> 
>> end
>> 
>> So that I can then do
>> 
>> Bas.attribute="a value"
>> Bas.attribute
>> 
>> Kind of like doing module_functions but that doesn't work inside a
>> class.
>
> I don't know why people make it so complicated. :-) All these are easier than 
> other approaches suggested so far:
>
> Foo = Struct.new(:attribute, :another_attribute)
> class Bas < Foo
> end
>
> class Bas < Struct.new(:attribute, :another_attribute)
> end
>
> or even
>
> Bas = Struct.new(:attribute, :another_attribute) do
>  def another_method() end
> end

You're adding instance methods to Bas rather than to Bas's singleton
class, though.  The OP wants to do:

   Bas.attribute = "a value"


David

-- 
                   David A. Black | dblack@rubypal.com
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org