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Kotlin Collections

21 posts

Kotlin hashSetOf()

Last Updated: 25 May 2025

In Kotlin, a HashSet is a generic, unordered collection that holds unique elements only. It does not allow duplicates and provides constant-time performance for basic oper...read more

Kotlin Collections

Kotlin - Collection Operations Overview

Last Updated: 10 May 2025

Kotlin provides a rich set of tools for working with collections like lists, sets, and maps. Whether you want to add, remove, sort, filter, or transform data, Kotlin’s sta...read more

Kotlin Collections

Kotlin Collection Transformation

Last Updated: 15 June 2025

The Kotlin Standard Library provides a rich set of extension functions for transforming collections. These transformations help us to build new collections or values deriv...read more

Kotlin Collections

Kotlin Collection Write operations

Last Updated: 15 June 2025

In Kotlin, when we work with collections like lists or sets, sometimes we need to change or update their contents. If a collection allows us to modify its elements, we cal...read more

Kotlin Collections

Kotlin Aggregate operations

Last Updated: 15 June 2025

When we work with collections like Lists or Arrays in Kotlin, sometimes we want to perform an operation on the entire collection rather than on individual elements. These ...read more

Kotlin Collections

Kotlin mutableListOf()

Last Updated: 15 June 2025

In Kotlin, when we want to create a list whose elements can be added, removed, or changed, we use the MutableList interface. To create an object of MutableList, we use the...read more

Kotlin Collections

Kotlin hashMapOf()

Last Updated: 15 June 2025

In Kotlin, when we want to store key-value pairs, we can use a HashMap. The function hashMapOf() is used to create an instance of HashMap. A HashMap allows us to store dat...read more

Kotlin Collections

Retrieve Single Elements In Kotlin

Last Updated: 15 June 2025

In Kotlin, we can easily retrieve single elements from a collection in many ways depending on our need—by position, by condition, randomly, or by checking if the element e...read more

Kotlin Collections

Kotlin mutableMapOf()

Last Updated: 15 June 2025

In Kotlin, mutableMapOf() is used to create a MutableMap. A MutableMap holds key-value pairs where keys are unique, but values can be duplicated. This means that each key ...read more

Kotlin Collections

Kotlin | Retrieve Collection Parts

Last Updated: 24 April 2023

The slice function allows you to extract a list of elements from a collection by specifying the indices of the elements you want to retrieve. The resulting list contains o...read more

Kotlin Collections

Kotlin Grouping

Last Updated: 15 June 2025

In Kotlin, grouping means collecting items from a collection (like lists) based on some common property or category. The Kotlin Standard Library provides useful functions ...read more

Kotlin Collections

Kotlin arrayListOf()

Last Updated: 15 June 2025

In Kotlin, the arrayListOf() function is used to create a new ArrayList. An ArrayList is a mutable collection, which means that we can add, remove, or update its elements ...read more

Kotlin Collections

Merge Two Collections in Kotlin

Last Updated: 15 June 2025

Kotlin is a statically typed, general-purpose programming language developed by JetBrains. The company famous for creating world-class IDEs like IntelliJ IDEA, PhpStorm, a...read more

Kotlin Collections

Sort a List by Specified Comparator in Kotlin

Last Updated: 15 June 2025

Sorting a list is one of the most common operations we perform when working with collections. In this article, we’ll learn how to sort a list by a specified comparator in ...read more

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Kotlin Collections

Kotlin partition() Method with Examples

Last Updated: 15 June 2025

While coding in Kotlin, there are times when we want to split a list into two separate collections based on a condition for example, separating even and odd numbers. Norma...read more

Kotlin Functions

Kotlin Collections