Subclass instance variable question

[The New Guy]

I want to be able to do the following. How would I go about it? (without class variables)

class Message
 
  def setMessage(message)
    message
  end
end
 
class NewMessage < Message
 
  attr_accessor :test
 
  def intialize
    @test = setMessage("Hello World")
  end
 
  def output
    @test
  end
 
end
 
puts NewMessage.new.output -> "Hello World"

[samsm]

Not sure what you mean, what you have works.

[The New Guy]

*sigh* My bad. I fixed it to show the problem I am having. I think I am more interested in why it doesn't work.

[Fenrir2]

why it doesn't work.

It doesn't work? I see no problem except unconventional names (setMessage vs set_message), and wrong names (setMessage doesn't *set* the message).

What you are using are instance variables, not class variables.

BTW, attr_accessor already defines test() and test=() methods:

puts NewMessage.new.test -> "Hello World"

You can, of course, cook your own objects with instance variables:

message = lambda do |var|
   lambda do |action|
     case action # dispatch
     when :set: lambda{|x| var = x} # setter method
     when :get: lambda{var} # getter
     end
   end
end.call(nil) # initial value is nil
 
message[:set]["Hello, world."]
message[:get][] #=> "Hello, world."
 
# same as:
 
message.call(:set).call("Hello, world.")
message.call(:get).call()

[The New Guy]

It doesn't work?

No, it puts "nil". Also, this is just junk code to express the problem please ignore the aesthetics of the code.

[Fenrir2]

Typo: "intialize".

[The New Guy]

Typo: "intialize".

Now, I feel like a even bigger fool. Sorry, to for wasting your time...

The problem I was originally looking for an answer for, before I mucked this thread up, was found here:

http://railstips.org/2006/11/18/clas...iables-in-ruby

Thanks for your time Fenrir