From: Robert Dober <robert.dober@...>
Date: 2006-04-10T04:21:52+09:00
Subject: Re: Dumb reflection problem - create object from String

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On 4/9/06, Brian Parkinson <parkI@whatevernot.com> wrote:
>
> Sven Klemm wrote:
>
> [deletia]
>
> > Module.const_get(s).new
>
> Thanks!
>
> I knew it would be a one-liner. :-)
>
> parki...


I am afraid that the only  one-liner is eval :(

suppose s contains the name of your class
Module.const_get s does not work unless your class is defined on top level.
In oder to have the *same* semantics as

   eval(s).new

we have to write

m =3D Module
s.split(%r{::|\.}).each do
    |name|
    m =3D m.const_get(name)
end
m.new

I suggest to look at ObjectSpace for another alternative, hardly more
efficent though :(

Robert


--
Deux choses sont infinies : l'univers et la b=EAtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

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