sortedsequence/io.timvanoijen.github.kotlin.sortedsequence/SortedKeyValueSequence/groupByKey

groupByKey

fun groupByKey(): SortedKeyValueSequence<TKey, List<TValue>>

Groups values by their keys, maintaining sort order.

Example:

val sequence = sequenceOf(1 to "a", 1 to "b", 2 to "c").assertSorted()
val result = sequence.groupByKey()
assertEquals(
  listOf(
    1 to listOf("a", "b"),
    2 to listOf("c")
  ),
  result.toList()
)

Return

A new sorted sequence with grouped values