associateWith
Returns a Map where keys are elements from the given sequence and values are produced by the valueSelector function applied to each element.
inline fun <K, V> Sequence<K>.associateWith(valueSelector: (K) -> V): Map<K, V>(source)
val fruits = sequenceOf("apple", "banana", "cherry")
val lengths = fruits.associateWith { it.length }
println(lengths) // {apple=5, banana=6, cherry=6}