November 2019
Beginner to intermediate
674 pages
15h
English
Content preview from Mastering Delphi Programming: A Complete Reference Guide
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Facade
The last pattern we described in this chapter is a bit different than the three we described before. The previous patterns were all wrapping one and only one component, while the facade pattern wraps multiple components and subsystems. In addition to that, facade is the only pattern from this chapter that provides a reduced interface and not a full feature set of wrapped components.
As such, a facade represents a front for a complex subsystem. Besides connecting subsystems together, it also provides a problem-specific interface. In fact, if we follow the single responsibility principle, we can implement multiple facades for the same set of subsystems, each providing a very specific interface to solve one specific problem.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.