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tariqasgharUX Design Techdegree Graduate 30,519 Points
List subclass append copy.
Why was append used with copy object instead of just simply appending the passed in "value" variable. Kenneth did explain this in the video, but I didn't get it at all.
Steven Parker221,296 Points
Making a copy lets you store what the value is now, and be sure it won't change.
If you don't make a copy, you get a reference to the original which might get changed in code later on.