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Objects in Kotlin 1. Introduction Kotlin borrowed many ideas from other languages; one of such constructs is the object. In this quick article, we’ll see what objects are and how can be used. 2. Objects in Kotlin In Kotlin, as in almost all JVM languages, there’s the concept of a… Continue Reading kotlin-objects
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Kotlin const, var, and val Keywords 1. Introduction In this tutorial, we’ll be outlining the key differences between the const, var, and val keywords in the Kotlin language. To put these keywords into context, we’ll be comparing them to their Java equivalents. 2. Understanding Typing To understand these keywords, we… Continue Reading kotlin-const-var-and-val-keywords
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Try-with-resources in Kotlin 1. Introduction Managed languages, such as those targeting the JVM, automatically handle the most common resource: memory. However, we need to deal with all kinds of resources, not just memory: files, network connections, streams, windows, etc. And, just like memory, those need to be released when no… Continue Reading kotlin-try-with-resources
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Kotlin Nested and Inner Classes 1. Introduction In this tutorial, we’ll look at four ways to create nested and inner classes in Kotlin. 2. Quick Comparison to Java For those thinking about Java nested classes, let’s do a quick rundown of related terms: Kotlin Java Inner Classes Non-Static Nested Classes… Continue Reading kotlin-inner-classes
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Introduction to Kotlin Coroutines 1. Overview In this article, we’ll be looking at coroutines from the Kotlin language. Simply put, coroutines allow us to create asynchronous programs in a very fluent way, and they’re based on the concept of Continuation-passing style programming. The Kotlin language gives us basic constructs but… Continue Reading kotlin-coroutines
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Kotlin Constructors 1. Overview In this tutorial, we’ll take a thorough look at constructors in Kotlin. Let’s start with a quick recap of the concept: we use constructors to create objects. These look like method declarations, but always have the same name as the class and they don’t return anything.… Continue Reading kotlin-constructors
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Kotlin and Tail Recursion 1. Introduction Some algorithms work best when implemented in a recursive manner – where a computation is based on a simpler form of the same computation. In most programming languages, there is a risk of a stack overflow associated with recursion. There is a limit on… Continue Reading kotlin-tail-recursion
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Kotlin return, break, continue Keywords 1. Overview In this tutorial, we’ll discuss the usage of structural jump expressions in Kotlin. Simply put, Kotlin has three structural jump expressions: return, break, continue. In the next sections, we’ll cover their functionalities with and without a label. 2. Labels in Kotlin Any expressions in… Continue Reading kotlin-return-break-continue
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Sealed Classes in Kotlin 1. Introduction Simply put, the Kotlin language borrowed a number of concepts from other functional languages to help with writing safer and more readable code. Sealed hierarchies is one of these concepts. 2. What Is a Sealed Class? Sealed Classes allow us to fix type hierarchies… Continue Reading kotlin-sealed-classes
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Lazy Initialization in Kotlin 1. Overview In this article, we’ll be looking at one of the most interesting features in Kotlin syntax – lazy initialization. We’ll also be looking at the lateinit keyword that allows us to trick compiler and initialize non-null fields in the body of class – instead… Continue Reading kotlin-lazy-initialization
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