From: "David A. Black" <dblack@...>
Date: 2004-11-29T20:15:36+09:00
Subject: Re: Seeking advice on some method names

Hi --

On Mon, 29 Nov 2004, Gavin Sinclair wrote:

> On Monday, November 29, 2004, 3:53:43 PM, David wrote:
> 
> >> > I'm not sure what either of these adds to const_get -- or, to put it
> >> > another way, why there should be a special method to do (essentially)
> >> > a const_get only for strings that represent class names.  
> >> 
> >> Well, IIRC, const_get doesn't work with symbols that contain "::". In
> >> other words, const_get( "Test::Unit" ) would fail--you'd have to do
> >> const_get("Test").const_get("Unit"), which becomes cumbersome. I can
> >> think of several instances in my Net::SSH and Net::SFTP stuff alone
> >> where a standard #get_class method would have been useful (though far
> >> from necessary).
> 
> > Oh right, I forgot about that.  There are some "deep" const_get
> > implementations floating around... along the lines of:
> 
> >   def deep_const_get(str)
> >     str.split('::').inject(Object) {|a,b| a.const_get(b) }
> >   end
> 
> > which might help.  
> 
> That's precisely how it's implemented in extensions.  BTW it's now
> Class.by_name.
> 
>   Class.by_name("::Test::Unit") -> Test::Unit

Is this restricted to Class objects?


David

-- 
David A. Black
dblack@wobblini.net