associateTo
Populates and returns the destination mutable map with key-value pairs provided by transform function applied to each element of the given sequence.
@IgnorableReturnValueinline fun <T, K, V, M : MutableMap<in K, in V>> Sequence<T>.associateTo(destination: M, transform: (T) -> Pair<K, V>): M(source)
val fruits = sequenceOf("apple", "banana", "cherry")
val fruitLengths = mutableMapOf<String, Int>()
fruits.associateTo(fruitLengths) { fruit -> fruit to fruit.length }
// fruitLengths is now: { apple=5, banana=6, cherry=6 }