By Marshall C. Yovits
This quantity in a chain detailing concepts in undefined, software program and the theory/design/applications of desktops, is worried with reusable software program elements, object-oriented modelling, discrete occasion simulation, and neurocomputing formalisms in laptop studying and visualization.
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Extra resources for Advances in Computers, Vol. 33
It is still possible to define a model that is highly suggestive of a particular implementation. For example, a Stack might be modeled as an ordered pair: an integer and a mapping from integer to math [Item]. Other representations are still possible; the question is whether a typical programmer is likely to think of anything else after seeing this sort of operational hint in the specification. Unfortunately, even with a completely abstract and definitional formalspecification method, it is amazingly easy to define behavior that rules out efficient implementations of the underlying concept.
This is the approach used in the remainder of the chapter. 4. Deslgnlng a Reusable Concept Having a notation to express abstract component designs is a big step toward promoting reuse. Of course, it is still necessary to design good reusable components, which has proved to be a surprisingly difficult quest. Some REUSABLE SOFTWARE COMPONENTS 21 reasons for this and some proposed guidelines to assist a designer of reusable concepts are explored in this section. 1 Efficiency and the Relationship between Concept and Content What else could be worse than not reusing software?
Using what Liskov and Guttag (1986) call a “definitional” style of specification¶ as opposed to an “operational” one, is a major step toward generality. A formal specification in either the algebraic or the model-based style must be abstract by its very nature because it explains program behavior through mathematical modeling. It is still possible to define a model that is highly suggestive of a particular implementation. For example, a Stack might be modeled as an ordered pair: an integer and a mapping from integer to math [Item].
Advances in Computers, Vol. 33 by Marshall C. Yovits