An object is passed by reference. I believe that this is due to passing the memory address of the object, not the physical object (or something along those lines).

>This brings up an interesting point (at least to me).
>
>The default behavior for parameter passing is by value unless specified. What happens when you pass an object to a function in the () like:
>something = myfunc(myobject)
>
>Is myobject passed by reference and therefore all the changes I make to it are reflected in the passed copy? Or do I have to explicitly pass it by reference using the @? Or do I have to return it after the changes are made?
>myobject = myfunc(myobject) will effectively remake the object.