From: macaco <macacoangel@...>
Date: 2008-02-07T11:32:00+09:00
Subject: Re: Dynamically instantiate a class

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I've found this:

  def create_class(var)
   #instantiate class type[var]
   foo = Object.const_get(type[var])
   sub = foo.new
   puts "#{sub.class}"
 end

Works for me!

On 2/6/08, macaco <macacoangel@gmail.com> wrote:
>
> Hi.
>
> I've been wondering if I can instantiate during execution, I have this
> subclasses, but I don't know how to do it by their name as a string.
>
> This is what I mean:
>
> class superClass
> ...
> end
>
> class subClass1 < superClass
> ...
> end
>
> class subClass2 <superClass
> ...
> end
>
> class caller
>    type = ['subClass1','subClass2']
>
>   def create_class(var)
>     #instantiate class type[var]
>     newClass = type[var].new # ?????
>   end
> end
>
> I don't wanna do it with a case clause, cos I don't know when I'm going to
> add more subclasses.
>
> Any idea?
>

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