July 2018
Intermediate to advanced
242 pages
8h 6m
English
Content preview from Kotlin Standard Library Cookbook
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Automatic null removal
While working with poorly designed APIs of servers or external libraries, we often need to deal with receiving null return values. Thankfully, there are a number of standard library features that allow us to handle null values effectively. In this recipe, we are going to implement a data preprocessing operation which will remove all the nulls from the dataset automatically. Let's say we are working with an external API that provides us with the latest news feed. Unfortunately, it's not null-safe and can return random null values. For example, let's assume we have a getNews(): List<News> function that returns the following data:
fun getNews() = listOf( News("Kotlin 1.2.40 is out!", "https://blog.jetbrains.com/kotlin/" ...
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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.
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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.