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Kotlin Programming Cookbook

You're reading from   Kotlin Programming Cookbook Explore more than 100 recipes that show how to build robust mobile and web applications with Kotlin, Spring Boot, and Android

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Product type Paperback
Published in Jan 2018
Publisher
ISBN-13 9781788472142
Length 434 pages
Edition 1st Edition
Languages
Tools
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Authors (2):
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Aanand Shekhar Roy Aanand Shekhar Roy
Author Profile Icon Aanand Shekhar Roy
Aanand Shekhar Roy
Rashi Karanpuria Rashi Karanpuria
Author Profile Icon Rashi Karanpuria
Rashi Karanpuria
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Toc

Table of Contents (21) Chapters Close

Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
1. Installation and Working with Environment FREE CHAPTER 2. Control Flow 3. Classes and Objects 4. Functions 5. Object-Oriented Programming 6. Collections Framework 7. Handling File Operations in Kotlin 8. Anko Commons and Extension Function 9. Anko Layouts 10. Databases and Dependency Injection 11. Networking and Concurrency 12. Lambdas and Delegates 13. Testing 14. Web Services with Kotlin 1. Other Books You May Enjoy Index

How to skip the first "n" entries in Kotlin


In this recipe, we will learn how to drop entries in a collection. First, we will see how to drop the first n items, then we will see how to drop the last n items, and finally, we will see how to use a predicate while dropping the elements from the collection.

Getting ready

I'll be using IntelliJ IDEA for writing and running Kotlin code; you are free to use any IDE that can do the same task.

How to do it…

In the following steps, we will learn to skip the first n entries of a Kotlin list:

  1. First, let's see how to drop the first n items in a collection. We will be using a list, but it also works with an array. Also, we will be using kotlin.stdlib, which contains the functions required in this recipe. The function to use here is drop:
fun main(args: Array<String>) {
    val list= listOf<Int>(1,2,3,4,5,6,7,8,9)
    var droppedList=list.drop(2)
    droppedList.forEach {
        print(" ${it} ")
    }
}

//Output: 3 4 5 6 7 8 9
  1. To skip the last n...
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