eachCount

Common
JVM
JS
Native
1.0
fun <T, K> Grouping<T, K>.eachCount(): Map<K, Int>
For JVM

Groups elements from the Grouping source by key and counts elements in each group.



fun main(args: Array<String>) {
//sampleStart
val words = "one two three four five six seven eight nine ten".split(' ')
val frequenciesByFirstChar = words.groupingBy { it.first() }.eachCount()
println("Counting first letters:")
println(frequenciesByFirstChar) // {o=1, t=3, f=2, s=2, e=1, n=1}

val moreWords = "eleven twelve".split(' ')
val moreFrequencies = moreWords.groupingBy { it.first() }.eachCountTo(frequenciesByFirstChar.toMutableMap())
println(moreFrequencies) // {o=1, t=4, f=2, s=2, e=2, n=1}
//sampleEnd
}

Return a Map associating the key of each group with the count of elements in the group.

For JS

Groups elements from the Grouping source by key and counts elements in each group.

Return a Map associating the key of each group with the count of element in the group.

For Native

Groups elements from the Grouping source by key and counts elements in each group.



fun main(args: Array<String>) {
//sampleStart
//Unresolved: samples.collections.Collections.Transformations.groupingByEachCount
//sampleEnd
}

Return a Map associating the key of each group with the count of elements in the group.