September 2019
Intermediate to advanced
462 pages
11h 3m
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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Flavors of Collections
In Java, we’re used to different types of collections: List, Set, Map, and so on. We can use them in Kotlin as well. The mutable collection interfaces of Java are split into two interfaces in Kotlin: an immutable read-only interface and a mutable read-write interface. Kotlin also provides a number of convenience methods on collections in addition to those from the JDK.
When you’re ready to iterate over the elements in any of these collections, Kotlin makes that task easier and much more fluent than in Java. At a high level, you may use the following collections in Kotlin:
- Pair—a tuple of two values.
- Triple—a tuple of three values.
- Array—indexed fixed-sized collection of objects and primitives.
- List—ordered collection of ...
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