Re: Scope

On 4 maio, 13:49, Rick DeNatale <[e-mail]> wrote:
> On Tue, May 4, 2010 at 9:55 AM, Eduardo Mucelli R. Oliveira
>
> <[e-mail]> wrote:
> > I have a script with those two following classes:
>
> > class String
> > =A0 def to_b
> > =A0 =A0 =A0["true"].include?(self.downcase)
> > =A0 end
> > end
>
> This opens up the system class String (or ::String if you prefer to
> explicitly specify the outer scope) and adds an instance method
> available to any instance of ::String
>
>
>
>
>
> > class HereIWantUseToB
> > =A0 "string".to_b
> > end
>
> > Ok, =A0that works fine, the to_b method can be "seen" by
> > HereIWantToUseToB class. But I wanted to those two classes inside
> > another class, or module, like this:
>
> > class Everything
> > =A0 # The two classes described above are here
> > end
>
> > module Everything
> > =A0 # The two classes described above are here
> > end
>
> Either
>
> class Everything
> =A0 class String
> =A0 =A0 =A0#...
> =A0 end
> end
>
> or
>
> module Everything
> =A0 class String
> =A0 =A0 =A0#...
> =A0 end
> end
>
> creates a new class Everything::String, which is unrelated to ::String
>
> > Anyway, for both cases I have the message "NoMethodError: undefined
> > method `to_b=92 for string." What is the scope point in here,
>
> A string literal, like "string', or "foo" will ALWAYS be an instance
> of ::String, and never an instance of Everything::String
>
> --
> Rick DeNatale
>
> Blog:http://talklikeaduck.denhaven2.com/
> Github:http://github.com/rubyredrick
> Twitter: @RickDeNatale
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> LinkedIn:http://www.linkedin.com/in/rickdenatale

Thanks, that solved my scope doubt.