January 2018
Intermediate to advanced
434 pages
14h 1m
English
Content preview from Kotlin Programming Cookbook
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How to do it…
In the following examples, we will try to sort objects based on certain properties. This will give us an idea of how to sort based on the specified comparator:
- Let's create a Person class with age property. We will be sorting a list of person objects based on age:
fun main(args: Array<String>) { val p1=Person(91) val p2=Person(10) val p3=Person(78) val listOfPerson= listOf(p1,p2,p3) var sortedListOfPerson=listOfPerson.sortedBy { it.age }}class Person(var age:Int)
- To sort a list based on the specified comparator, we need to use the sortedBy function:
fun main(args: Array<String>) { val p1=Person(91) val p2=Person(10) val p3=Person(78) val listOfPerson= listOf(p1,p2,p3) var sortedListOfPerson=listOfPerson.sortedBy { it.age ...Become 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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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.