How to Add A List In List Of List In Kotlin?

8 minutes read

You can add a list to a list of lists in Kotlin by simply creating a new list and adding it to the existing list of lists. This can be achieved using the add function to add a new list to the list of lists.

Best Kotlin Books to Read in 2024

1
Atomic Kotlin

Rating is 5 out of 5

Atomic Kotlin

2
Kotlin Cookbook: A Problem-Focused Approach

Rating is 4.9 out of 5

Kotlin Cookbook: A Problem-Focused Approach

3
Head First Kotlin: A Brain-Friendly Guide

Rating is 4.8 out of 5

Head First Kotlin: A Brain-Friendly Guide

4
Kotlin in Action

Rating is 4.7 out of 5

Kotlin in Action

5
Kotlin In-Depth: A Guide to a Multipurpose Programming Language for Server-Side, Front-End, Android, and Multiplatform Mobile (English Edition)

Rating is 4.6 out of 5

Kotlin In-Depth: A Guide to a Multipurpose Programming Language for Server-Side, Front-End, Android, and Multiplatform Mobile (English Edition)

6
Kotlin Design Patterns and Best Practices: Build scalable applications using traditional, reactive, and concurrent design patterns in Kotlin, 2nd Edition

Rating is 4.5 out of 5

Kotlin Design Patterns and Best Practices: Build scalable applications using traditional, reactive, and concurrent design patterns in Kotlin, 2nd Edition

7
Kotlin Programming: The Big Nerd Ranch Guide (Big Nerd Ranch Guides)

Rating is 4.4 out of 5

Kotlin Programming: The Big Nerd Ranch Guide (Big Nerd Ranch Guides)

8
Java to Kotlin

Rating is 4.2 out of 5

Java to Kotlin

9
Kotlin Essentials (Kotlin for Developers)

Rating is 4.1 out of 5

Kotlin Essentials (Kotlin for Developers)


How to count the occurrences of an element in a list of lists in Kotlin?

To count the occurrences of an element in a list of lists in Kotlin, you can use the following code:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
fun countOccurrences(list: List<List<Int>>, element: Int): Int {
    var count = 0
    for (innerList in list) {
        count += innerList.count { it == element }
    }
    return count
}

fun main() {
    val list = listOf(
        listOf(1, 2, 3),
        listOf(4, 2, 6),
        listOf(7, 8, 2)
    )

    val element = 2
    val occurrences = countOccurrences(list, element)
    println("The element $element occurs $occurrences times in the list of lists.")
}


In this code, the countOccurrences function takes a list of lists and the element you want to count occurrences of as parameters. It then iterates over each inner list and uses the count function to count the occurrences of the element in that inner list. Finally, it returns the total count of occurrences.


You can test this code by providing a list of lists and an element to count, and the code will print out the number of occurrences of that element in the list of lists.


How to shuffle a list of lists in Kotlin?

To shuffle a list of lists in Kotlin, you can use the Shuffle function from the Collections utility class. Here is an example code snippet to shuffle a list of lists:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
fun main() {
    val list1 = listOf(1, 2, 3)
    val list2 = listOf(4, 5, 6)
    val list3 = listOf(7, 8, 9)

    val lists = mutableListOf(list1, list2, list3)

    // Shuffle the list of lists
    lists.shuffle()

    for (list in lists) {
        println(list)
    }
}


In this example, we first create three lists (list1, list2, list3) and then add them to a mutable list lists. We then call the shuffle() function on the lists list to shuffle the order of the lists. Finally, we iterate over the shuffled lists and print them out.


You can run this code in a Kotlin environment to see the shuffled list of lists.


How to combine two lists into a list of lists in Kotlin?

You can combine two lists into a list of lists in Kotlin by using the plus operator to concatenate the two lists and then converting the result into a list of lists. Here's an example:

1
2
3
4
5
6
7
8
fun main() {
    val list1 = listOf(1, 2, 3)
    val list2 = listOf(4, 5, 6)

    val combinedList = listOf(list1 + list2)

    println(combinedList)
}


In this example, list1 and list2 are combined using the plus operator to create a new list [1, 2, 3, 4, 5, 6] and then converted into a list of lists [ [1, 2, 3, 4, 5, 6]].


How to convert a list to a list of lists in Kotlin?

You can convert a list to a list of lists in Kotlin by using the chunked() function. This function splits the original list into sublists of a specified size, resulting in a list of lists.


Here's an example of how you can convert a list to a list of lists in Kotlin:

1
2
3
4
5
6
7
fun main() {
    val originalList = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
    
    val listOfLists = originalList.chunked(2)
    
    println(listOfLists)
}


In this example, the originalList is converted into a list of lists with a size of 2 using the chunked(2) function. The output will be [[1, 2], [3, 4], [5, 6], [7, 8], [9, 10]].

Facebook Twitter LinkedIn Telegram Whatsapp Pocket

Related Posts:

To call a Kotlin function from JavaScript, you can use the Kotlin/JS plugin that allows you to compile Kotlin code to JavaScript. First, define your Kotlin function in a Kotlin file using the external keyword to tell the Kotlin compiler that this function will...
To run Kotlin on Ubuntu, you can follow these steps:Install Java Development Kit (JDK): Since Kotlin runs on the Java Virtual Machine (JVM), you need to have Java installed on your system. Open a terminal and run the following command to install the default JD...
To use a Kotlin function in Java, you can follow these steps:Create a Kotlin function that you want to use in Java. For example, let&#39;s consider a simple function named printMessage() that prints a message. fun printMessage() { println(&#34;Hello, world...
Working with Android extensions in Kotlin allows you to leverage the power of Kotlin&#39;s extension functions to easily enhance the functionality of Android classes. Here&#39;s how you can work with Android extensions in Kotlin.To create an Android extension,...
In order to call a top-level Kotlin function in Java, you need to follow the steps below:Ensure that the Kotlin function is defined as a top-level function, which means it is not nested inside any class or object. Import the necessary Kotlin dependencies in yo...
The Kotlin Standard Library functions are a collection of commonly used extension functions and top-level functions provided by the Kotlin programming language. These functions aim to simplify and enhance the development process by offering a set of utility fu...