Quote: object-oriented abstraction as constructors of objects with fields as observations

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Procedural data abstraction [e.g., object-oriented] can be viewed as … The values of the different observations are spread … values, or objects. The arguments to the constructor … the nil object has no local state, while … other to hold the rest of the list. … [p. 160] The observations … attributes or methods. … Since the result of an observation to a … needs to be hidden from the client. In … [data abstraction specification] matrix in this way, a case discrimination is done on …   Google-1   Google-2

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Quote: object-oriented abstraction disciminates the operation vs. representation for abstract data type

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