inline fun <K, V> Sequence<K>.associateWith(valueSelector: (K) -> V): Map<K, V>(source)

Returns a Map where keys are elements from the given sequence and values are produced by the valueSelector function applied to each element.

If any two elements are equal, the last one gets added to the map.

The returned map preserves the entry iteration order of the original sequence.

The operation is terminal.

Since Kotlin



import kotlin.test.*

fun main() { 
   val words = listOf("a", "abc", "ab", "def", "abcd")
val withLength = words.associateWith { it.length }
println(withLength.keys) // [a, abc, ab, def, abcd]
println(withLength.values) // [1, 3, 2, 3, 4]