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Learn Kotlin Programming

You're reading from   Learn Kotlin Programming A comprehensive guide to OOP, functions, concurrency, and coroutines in Kotlin 1.3

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Product type Paperback
Published in May 2019
Publisher Packt
ISBN-13 9781789802351
Length 514 pages
Edition 2nd Edition
Languages
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Authors (2):
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Stefan Bocutiu Stefan Bocutiu
Author Profile Icon Stefan Bocutiu
Stefan Bocutiu
Stephen Samuel Stephen Samuel
Author Profile Icon Stephen Samuel
Stephen Samuel
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Toc

Table of Contents (21) Chapters Close

Preface 1. Section 1: Fundamental Concepts in Kotlin FREE CHAPTER
2. Getting Started with Kotlin 3. Kotlin Basics 4. Object-Oriented Programming in Kotlin 5. Section 2: Practical Concepts in Kotlin
6. Functions in Kotlin 7. Higher-Order Functions and Functional Programming 8. Properties 9. Null Safety, Reflection, and Annotations 10. Generics 11. Data Classes 12. Collections 13. Testing in Kotlin 14. Microservices with Kotlin 15. Section 3: Advanced Concepts in Kotlin
16. Concurrency 17. Coroutines 18. Application of Coroutines 19. Kotlin Serialization 20. Other Books You May Enjoy

Varargs

Kotlin allows functions to be defined so that they would accept a variable number of arguments. Hence, this feature is called varargs. Varargs allow users to pass in a comma-separated list of arguments, which the compiler will automatically wrap into an array. Java developers will already be familiar with the feature, which, in Java, looks like the following:

    public void println(String.. args) { } 

The Kotlin equivalent is to use the vararg keyword before the parameter name:

    fun multiprint(vararg strings: String): Unit { 
      for (string in strings) 
      println(string) 
    } 

This would be invoked by simply enumerating the arguments as in the following example:

    multiprint("a", "b", "c") 

Functions can have regular parameters, and, at most, one parameter marked as vararg:

    fun multiprint(prefix: String, vararg strings:...
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