Kotlin Map Collection | How to use Map and Mutable Map in Kotlin | Map in Kotlin

Map-specific operations In maps, types of both keys and values are user-defined. Key-based access to map entries enables various map-specific processing capabilities from getting a value by key to separate filtering of keys and values. On this page, we provide descriptions of the map processing functions from the standard library. Retrieve keys and values

For retrieving a value from a map, you must provide its key as an argument of the get() function. The shorthand [key] syntax is also supported. If the given key is not found, it returns null. There is also the function getValue() which has slightly different behavior: it throws an exception if the key is not found in the map. Additionally, you have two more options to handle the key absence:

Kotlin Map Interface Kotlin Map is an interface and generic collection of elements. Map interface holds data in the form of key and value pair. Map key are unique and holds only one value for each key.

Working With Maps in Kotlin In this tutorial, we’ll look at the Map collection type in Kotlin. We’ll start with the definition of a map and its characteristics.

Then we’ll look into how to make maps in Kotlin. The rest of the article will go over common operations like reading entries, changing entries, and data transformations. 2. Kotlin Maps Maps are a common data structure in computer science. They’re also known as dictionaries or associative arrays in other programming languages. Maps can store a collection of zero or more key-value pairs. Each key in a map is unique, and it can only be associated with one value. The same value can be associated with multiple keys though. The Map interface is one of the primary collection types in Kotlin. We can declare the keys and values to be any type; there are no restrictions:

Kotlin Map : mapOf() Kotlin map is a collection which contains pairs of objects. Map holds the data in the form of pairs which consists of a key and a value. Map keys are unique and the map holds only one value for each key. Kotlin distinguishes between immutable and mutable maps. Immutable maps created with mapOf() means these are read-only and and mutable maps created with mutableMapOf() means we can perform read and write both.

Map A collection that holds pairs of objects (keys and values) and supports efficiently retrieving the value corresponding to each key. Map keys are unique; the map holds only one value for each key. Methods in this interface support only read-only access to the map; read-write access is supported through the MutableMap interface.

In this tutorial we are going to learn about read only map and mutable maps in kotlin android studio. Follow my Facebook Page : https://www.facebook.com/105940115222549 Follow me on Instagram : https://www.instagram.com/p/CViUlw2sOMi Follow me on tumblr : http://programming-guru.tumblr.com Follow me on reddit : https://www.reddit.com/u/Programming_guru1?utm_medium=android_app&utm_source=share #Kotlin #android #tutorial

Kotlin Map Collection | How to use Map and Mutable Map in Kotlin | Map in Kotlin Kotlin Map Collection | How to use Map and Mutable Map in Kotlin | Map in Kotlin Kotlin Map Collection | How to use Map and Mutable Map in Kotlin | Map in Kotlin

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