August 2017
Intermediate to advanced
440 pages
10h
English
Content preview from Android Development with Kotlin
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Generics Are Your Friends
In the previous chapter, we discussed concepts related to functional programming and functions as first-class citizens in Kotlin.
In this chapter, we will discuss the concepts of generic types and generic functions, known as generics. We will learn why they exist and how to use them and also how to define generic classes, interfaces, and functions. We will discuss how to deal with generics at runtime, take a look at subtyping relations, and deal with generic nullability.
In this chapter, we will cover the following topics:
- Generic classes
- Generic interfaces
- Generic functions
- Generic constraints
- Generic nullability
- Variance
- Use-site target versus declaration-site target
- Declaration-site target
- Type erasure
- Reified ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.