From: Kevin Smith <kevinbsmith@...>
Date: 2001-11-23T01:02:09+09:00
Subject: [ruby-talk:26148] Re: Passing class names to constructors.

--- Hugh Sasse Staff Elec Eng <hgs@dmu.ac.uk> wrote:
> If I want to create a variable number of objects, 
> all of subclasses of one class, then how do I do 
> that? Eg in my knots example I might want
> 
> class TangledRope
>     def initialize(knotclass = :Knot)
>         mess = Array.new()
>         (10*rand()).times do {
>             mess.push(knotclass.something.new())
>         }
> end

Here's my attempt.

Kevin

---
class Upper
    def initialize(text)
        @text = text.upcase
    end
end

class Lower
    def initialize(text)
        @text = text.downcase
    end
end

def factory(text, klass=Upper)
    return klass.new(text)
end

a = factory('Hello')
b = factory('Hello', Lower)

p a.inspect
p b.inspect


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