From: Morton Goldberg <m_goldberg@...>
Date: 2007-09-26T07:35:27+09:00
Subject: Re: Using a block to configure/initialize a class

On Sep 25, 2007, at 6:09 PM, Emmanuel Oga wrote:

> Hi! i need a solution for this, it's pretty simple but i can't get  
> it to
> work...
>
> suppose:
>
> class Options
>
>   def self.define_an_option
>     # ...don't-know-how-implementation :(
>   end
>
>   define_an_option :option1, String
>   define_an_option :option2, Array
> end
>
> Then, i want to do something like this:
>
> opt= Options.new
> opt.option1 => ""
> opt.option2 => []
>
> opt.option1 do |o|
>   o= "Hello"
> end
>
> opt.option2 do |o|
>   o << 10
> end
>
> options.option1 => "Hello"
> options.option2 => [10]
>
> Thats all! Seems pretty simple, but i tried with a lot of variants  
> and I
> don't get it to work. Any ideas?

Have you looked at the built-in class Struct? I think it will supply  
what you need.

<code>
Options = Struct.new(:option1, :option2)
opt=Options.new("", [])
opt.option1 = "Hello"
opt.option2 << 10 << 42
opt.option1 # => "Hello"
opt.option2 # => [10, 42]
</code>

Regards, Morton