The methods of MutableList interface supports both read and write functionalities. If you need an immutable empty list instance, you can use listOf() function as shown below. ... * Removes the first element from this mutable list and returns that removed element, or throws [NoSuchElementException] if this list is empty. The kotlin functions sort, sortBy etc. If you don't want to sort the elements in-place but rather return a sorted list (your base doesn't need to be a MutableList), you can use sorted, sortedBy etc: Returns a new MutableMap with the specified contents, given as a list of pairs where the first component is the key and the second is the value.. Last element in list: Kotlin Is list empty: false Sublist from index 1 to 3 [Study, tonight] Kotlin Mutable List. Mutable lists are dynamic in nature. The MutableList interface also inherits the Collection interface. Kotlin MutableList (mutableListOf()) Kotlin MutableList is an interface and generic collection of elements. */ @SinceKotlin(" 1.4 ") It inherits form Collection class. It is a modifiable collection. This creates an immutable list, similar to Arrays.asList in Java. List: listOf; Map: mapOf; Set: setOf; And mutable collections. Mutable lists (MutableList) Mutable lists can have elements added or removed. Familiar with basic Kotlin programming concepts from Unit 1 of the Android Basics in Kotlin course: the main() function, functions arguments and return values, variables, data types and operations, as well as control flow statements. In this tutorial, we are going to learn about Kotlin mutableMapOf collection with the help of examples. It creates a MutableList implementation which provides a dynamic array size as its backing storage. In this tutorial, we are going to learn about Kotlin ArrayList with the help of examples. https://www.baeldung.com/kotlin/initialize-empty-mutable-collections all sort the items in the list itself. The method mutableListOf() returns an instance of MutableList Interface and takes the array of a particular type or mixed (depends on the type of MutableList instance) elements or it can be null also. There are several ways to initialize an empty list as discussed below: 1. listOf() function. Contribute to JetBrains/kotlin development by creating an account on GitHub. MutableList interface is mutable in nature. Immutable. In Kotlin, mutableListOf() method is used to instantiate MutableList Interface. This article explores different ways to initialize an empty List in Kotlin. As frogcoder states in a comment, emptyList() does the same, but naturally returns an empty list. The most common way to create a collection is with the standard library functions listOf(), setOf(), mutableListOf(), mutableSetOf().If you provide a comma-separated list of collection elements as arguments, the compiler detects the element type automatically. MutableList class is used to create mutable lists in which the elements can be added or removed. ArrayList is a mutable collection. Able to define a Kotlin class, create an object instance from it, and access its properties and methods. Mutable lists are created using MutableList interface. It holds the data as key and value. We have two types of collections in Kotlin. ... or returns `null` if this list is empty. Edit Page Constructing Collections Constructing from elements. From the documentation of sort: Sorts the array in-place according to the natural order of its elements. 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