Quote: a concrete type such as 'date' is closely matched to an efficient, complete implementation without dependencies on other classes

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To sum up, a class providing a concrete … [such as vector, date, or complex] … [1] be a close match to a particular concept and implementation … [2] … [3] have only minimal dependency on other classes; … [4] … [p. 432] In essence, concrete types cannot explicitly express … concept of a set, but that is not … This potential nuisance is compensated for by having … [with efficient implementations] … [This] is often crucial for efficiency and important …   Google-1   Google-2

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Quote: concrete types do not express commonality of concepts; e.g., a 'set' is not a concrete type because it may be an 'slist' or a 'vector' with different performance characteristics

Related Topics

Topic: types of object-oriented classes (18 items)