January 2017
Intermediate to advanced
420 pages
9h 25m
English
Content preview from Programming KotlinBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Top-level functions
In addition to member functions and local functions, Kotlin also supports declaring top-level functions. These are functions that exist outside of any class, object, or interface and are defined directly inside a file. The name top-level comes from the fact that functions are not nested inside any structure and so they are at the top of the hierarchy of classes and functions.
Top-level functions are especially useful for defining helper or utility functions. It does not necessarily make sense to group them with other functions or create them when the contained object adds no value. In Java, these kinds of functions exist as static functions inside helper classes. An example would be the functions of collections in the Java standard ...
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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.