![]() ![]() You may need to decipher that every time you come back to it. The get() function is used to retrieve a value at index. ![]() ![]() The indices/ mapIndexed-solution rather hide what's going on. forEachIndexed - Kotlin Programming Language JVM JS Native Version 1. Kotlin provides easy functions to create an instance of an array. ![]() Syntax List. It's way easier to read when you come back. For Loops and the forEach function In this video, you're going to learn how to iterate over collections - or even more generally iterables - in Kotlin. The Kotlin List.forEach () function performs the given action on each element of the list. And I can only recommend you to use the flatMap instead. Depending on how complex your condition is, the indices themselvses will not suffice you. Note that if what you are trying to insert is static, solution with the indices is of course easier then the mapping I've presented above. It should be easy enough though to add that case. In the following example, we will traverse through the 'Subject' array and we will print the index along with the value. forEachIndexed is an inline function which takes an array as an input and its index and values are separately accessible. indexOf returns -1 or itemsToInsertAfterMatch = null). nstead of using forEach () loop, you can use the forEachIndexed () loop in Kotlin. what is matched with what? and what is inserted when where?).Īll the above solutions did not yet deal with the case when an element wasn't found (e.g. If you do not must (and who forces you?), I wouldn't use such a construct. As you said you iterate over the list, maybe a flatMap is rather something for you (in this example I add "odd", "even" after elements that are odd/even): val list = listOf("1", "2", "3", "4")Ġ -> listOf(it, " listOf(it, " itemsToInsertAfterMatch?.let A foreach loop’s goal is to easily iterate over a collection, without managing an index variable or checking the collection’s length. ![]()
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