November 2019
Beginner to intermediate
674 pages
15h
English
Content preview from Mastering Delphi Programming: A Complete Reference Guide
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Nullable Value, Template Method, Command, and State
Every moderately complex program is a collection of many interlocked parts. In Delphi, as in other object—oriented languages, these parts are represented by objects that can cooperate in different ways. They can be tightly connected one object can own others, or they may just cooperate for a short time.
As with every complex system, there's a big chance that it will evolve into a big mess of parts that are connected in random ways without any order and reason. (Sometimes, we affectionately call such a mess a big ball of mud. It is not a pleasant sight.) The patterns in the behavioral group help us to organize objects so that they are tightly coupled where they have to be, can cooperate with ...
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