In this Kotlin Tutorial, we learned how to filter a List using a condition/predicate with access to index in the predicate, using filterIndexed() function, with the help of examples. Output Original List : įiltered List : Conclusion withIndex - Kotlin Programming Language Common JVM JS Native Version 1.8 kotlin-stdlib / llections / withIndex withIndex Common JVM JS Native 1. Var filteredList = myList.filterIndexed(') In the following program, we will take a List of Integers and filter the numbers based on the condition formed using index and the element.

Therefore, we can fall filterIndexed() function on a List, or a Mutable List. The original list on which filterIndexed() function is called, remains unchanged. List.filterIndexed() function returns a List.Įlements of the List that return true for the given predicate, make it to the filtered List. Predicate is a lambda function that takes the index and element of the List as parameter and returns a boolean value. To modify an array element, we should do: num 2 5 This will change the value of the third element in the num array to 5. To access an array element, the syntax would be: val x num 1 This will assign the value of the second element in num to x.

The syntax to call filterIndexed() function on a List with a predicate is List.filterIndexed(predicate) Using the index operator The operator can be used to access and modify arrays.

With index kotlin