From: Sylvester the Cat <ingredient17@...>
Date: 2005-11-22T12:10:57+09:00
Subject: diff't way to create an instance

Hello!
I am new to Ruby and have a question that seems easy but I'm unsure 
where to look on the Net for a solution:

Is there a way to create an instance of a class other than using .new() 
method?
Esp when I don't know the Class name at design time

example:  I have a collection of objects like a shopping basket.  I 
create an instance of an apple (a = Apple.new) and put it in the basket. 
I create a banana and do the same (B = Banana.new).

Now you say to me "oh hey, we need Kiwi!" All I have from this message 
is the literal string "Kiwi" (message = "kiwi"). How do I create an 
instance of a Kiwi ??

I can't do
k = #{message}.new
nor
k = "#{message}.new"
nor
k = "Kiwi".new

because that is literally the string object "Kiwi".

Is there an alternate such as k = createObject("kiwi").new
a related question: what is this sort of problem called?! "Creating an 
instance of a class by reference" ??

thanks!


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