aggregateTo
inline fun <T, K, R, M : MutableMap<in K, R>> Grouping<T, K>.aggregateTo(
destination: M,
operation: (key: K, accumulator: R?, element: T, first: Boolean) -> R
): M
Platform and version requirements: Kotlin 1.1
Groups elements from the Grouping source by key and applies 登录查看完整内容
