From: "Todd S." <tgate@...>
Date: 2006-01-30T15:13:17+09:00
Subject: misunderstanding the Passing of references

I'm to to ruby...

Currently, I'm stuck in a situation where I'm changing values I'm not 
intending to and I don't know how to correct it.

I have... A class "Model" and a class "DataObject".  The "Data Object" 
class has a method which takes in a "Model" and returns a new "Model". 
The problem is, my "generate_new_model" method is altering the input 
"Model" object.

The below show basically what I've done to create the objects.  Somehow 
when I define a new "Model" for output and set it's values to the source 
model's values, when I change the outputModel values it alters the 
source model.

What am I doing wrong?


@myModel = Model.new
@myData   = DataObject.new

newModel = @myData.generate_new_model(@myModel)


def generate_new_model(modelSource)
    outputModel = Model.new
    outputModel = modelSource

    outputModel.values = "new values"

    outputModel
end

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