June 2018
Beginner
722 pages
18h 47m
English
Content preview from Introduction to Programming
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Preferring variable type Set
As in the case of List, using type Set for the variable that holds a reference to the object of the class that implements the Set interface is a good programming practice called coding to an interface. It assures independence of the client code from any particular implementation. So, it is a good habit to write Set<Person> persons = new HashSet<>(), for example.
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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.