Best Kotlin Programming Books to Buy in October 2025
Head First Kotlin: A Brain-Friendly Guide
Kotlin in Action, Second Edition
Android Programming with Kotlin for Beginners: Build Android apps starting from zero programming experience with the new Kotlin programming language
Head First Android Development: A Learner's Guide to Building Android Apps with Kotlin
Programming Android with Kotlin: Achieving Structured Concurrency with Coroutines
Kotlin In-Depth: A Guide to a Multipurpose Programming Language for Server-Side, Front-End, Android, and Multiplatform Mobile (English Edition)
Kotlin from Scratch: A Project-Based Introduction for the Intrepid Programmer
Kotlin: An Illustrated Guide
Functional Programming in Kotlin
Kotlin Design Patterns and Best Practices: Elevate your Kotlin skills with classical and modern design patterns, coroutines, and microservices
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.
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:
fun countOccurrences(list: List<List>, 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:
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:
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:
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]].