Kotlin listOf The listOf method creates a new read-only list in Kotlin. Read-only lists are created with listOf and mutable lists with mutableListOf. Kotlin distinguishes between read-only and mutable lists.

A list is a generic ordered collection of elements. take(n) : Returns a list of the first n items: fun main(args: Array<. Kotlin lists tutorial shows how to work with lists in Kotlin. This example is being shown just for learning purposes, no one would normally decide to use any of these methods considering that we can use take or drop instead. We will be using the take function and its variants for limiting the items in the list. There are no run-time dependencies beyond the Kotlin standard library. mvnw clean verify with the same JDK.) This project assumes JDK 17. We have to remember that Kotlin collections indexes start from zero, that’s why we check for index 4 in the boundaries. Kotlin List Map Tree Experiment with viewing a tree as a list and a map. We have implemented both take and drop by checking that the index is below or above 4. `should take first five elements`() ĪssertThat(filtered).containsExactly(10, 7, 3, 33) For example, we’re taking the first five elements in our test below. The first method we’re going to look at is take, we can use this method when we need to take just the first n elements. Photo by John Cameron on Unsplash Kotlin take() There is one more way to build a list in Kotlin that is as of this writing in the experimental state but hopefully should change soon.

List in kotlin