groupByTo
inline suspend fun <E, K, M : MutableMap<in K, MutableList<E>>> ReceiveChannel<E>.groupByTo(
destination: M,
keySelector: (E) -> K
): M (source)Platform and version requirements: JVM
Groups elements of the original channel by the key returned by the given keySelector function applied to each element and puts to the destination map each group key associated with a list of corresponding elements.
Return
The destination map.
The operation is terminal. This function consumes all elements of the original ReceiveChannel.
inline suspend fun <E, K, V, M : MutableMap<in K, MutableList<V>>> ReceiveChannel<E>.groupByTo(
destination: M,
keySelector: (E) -> K,
valueTransform: (E) -> V
): M (source)Platform and version requirements: JVM
Groups values returned by the valueTransform function applied to each element of the original channel by the key returned by the given keySelector function applied to the element and puts to the destination map each group key associated with a list of corresponding values.
Return
The destination map.
The operation is terminal. This function consumes all elements of the original ReceiveChannel.