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Object class object_id method, 2nd Object, private instance methods Object.new objects adding to stack ancestry basic behavior change defining encapsulating extending callable, defined cloning comparison dereferencing duplication equality extending with a module freezing functionality, adding to with extend generic creating id number identifying uniquely individuation initializing with state innate behaviors intermediate manipulating methods method methods, listing nature vs. nurture non-private methods, listing numerical orientation private_methods method protecting with enumerators querying, 2nd relationship to variable removing from stack responding to messages sending message to special-value ...
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