From: Simen Edvardsen <toalett@...>
Date: 2007-07-04T21:57:31+09:00
Subject: Re: Verify if a class exists

On 7/4/07, Bernd Burnt <djbearhand@gmx.de> wrote:
> Simen Edvardsen wrote:
> > On 7/4/07, Bernd <burnt99@hotmail.com> wrote:
> >>
> >>
> >
> > Try a const_get. Like so:
> >
> > def class_exists?(name)
> >   begin
> >     true if Kernel.const_get(name)
> >   rescue NameError
> >     false
> >   end
> > end
>
> Hi,
> first of all, thanks for your help, Simen. I think, I even found a
> better solution, I assign the name to the class with
>
> Object.const_set class_name, klass
>
> So I can determine, whether the class exists with
>
> Object const_defined? class_name
>
> You are using exception handling (rescue) for a conditional branch,
> which I try to avoid whenever possible, to keep my code well structured.
>

There is a const_defined? method? Ah, I see it's been some time since
I programmed Ruby. Excuse my ignorant advice, it seems you find a
better solution :)

> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 
- Simen