Move groupingByEachCount together with the new Grouping samples
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@@ -8668,7 +8668,7 @@ public inline fun <K, V, M : MutableMap<in K, MutableList<V>>> CharArray.groupBy
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* Creates a [Grouping] source from an array to be used later with one of group-and-fold operations
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* using the specified [keySelector] function to extract a key from each element.
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*
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* @sample samples.collections.Collections.Transformations.groupingByEachCount
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* @sample samples.collections.Grouping.groupingByEachCount
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*/
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@SinceKotlin("1.1")
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public inline fun <T, K> Array<out T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {
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@@ -1270,7 +1270,7 @@ public inline fun <T, K, V, M : MutableMap<in K, MutableList<V>>> Iterable<T>.gr
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* Creates a [Grouping] source from a collection to be used later with one of group-and-fold operations
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* using the specified [keySelector] function to extract a key from each element.
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*
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* @sample samples.collections.Collections.Transformations.groupingByEachCount
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* @sample samples.collections.Grouping.groupingByEachCount
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*/
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@SinceKotlin("1.1")
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public inline fun <T, K> Iterable<T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {
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@@ -828,7 +828,7 @@ public inline fun <T, K, V, M : MutableMap<in K, MutableList<V>>> Sequence<T>.gr
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*
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* The operation is _intermediate_ and _stateless_.
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*
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* @sample samples.collections.Collections.Transformations.groupingByEachCount
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* @sample samples.collections.Grouping.groupingByEachCount
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*/
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@SinceKotlin("1.1")
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public inline fun <T, K> Sequence<T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {
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@@ -805,7 +805,7 @@ public inline fun <K, V, M : MutableMap<in K, MutableList<V>>> CharSequence.grou
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* Creates a [Grouping] source from a char sequence to be used later with one of group-and-fold operations
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* using the specified [keySelector] function to extract a key from each character.
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*
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* @sample samples.collections.Collections.Transformations.groupingByEachCount
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* @sample samples.collections.Grouping.groupingByEachCount
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*/
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@SinceKotlin("1.1")
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public inline fun <K> CharSequence.groupingBy(crossinline keySelector: (Char) -> K): Grouping<Char, K> {
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@@ -14,7 +14,7 @@ package kotlin.collections
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*
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* @return a [Map] associating the key of each group with the count of elements in the group.
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*
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* @sample samples.collections.Collections.Transformations.groupingByEachCount
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* @sample samples.collections.Grouping.groupingByEachCount
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*/
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@SinceKotlin("1.1")
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public actual fun <T, K> Grouping<T, K>.eachCount(): Map<K, Int> =
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@@ -369,17 +369,7 @@ class Collections {
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assertTrue(mutableNamesByTeam == namesByTeam)
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}
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@Sample
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fun groupingByEachCount() {
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val words = "one two three four five six seven eight nine ten".split(' ')
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val frequenciesByFirstChar = words.groupingBy { it.first() }.eachCount()
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println("Counting first letters:")
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assertPrints(frequenciesByFirstChar, "{o=1, t=3, f=2, s=2, e=1, n=1}")
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val moreWords = "eleven twelve".split(' ')
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val moreFrequencies = moreWords.groupingBy { it.first() }.eachCountTo(frequenciesByFirstChar.toMutableMap())
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assertPrints(moreFrequencies, "{o=1, t=4, f=2, s=2, e=2, n=1}")
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}
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@Sample
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fun joinTo() {
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@@ -10,6 +10,20 @@ import java.util.stream.Collector
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import kotlin.test.*
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class Grouping {
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@Sample
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fun groupingByEachCount() {
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val words = "one two three four five six seven eight nine ten".split(' ')
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val frequenciesByFirstChar = words.groupingBy { it.first() }.eachCount()
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println("Counting first letters:")
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assertPrints(frequenciesByFirstChar, "{o=1, t=3, f=2, s=2, e=1, n=1}")
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val moreWords = "eleven twelve".split(' ')
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val moreFrequencies = moreWords.groupingBy { it.first() }.eachCountTo(frequenciesByFirstChar.toMutableMap())
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assertPrints(moreFrequencies, "{o=1, t=4, f=2, s=2, e=2, n=1}")
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}
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@Sample
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fun aggregateEvenAndOdd() {
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val intList = listOf(0, 1, 2, 3, 4, 5, 6)
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@@ -250,7 +250,7 @@ public inline fun <S, T : S, K, M : MutableMap<in K, S>> Grouping<T, K>.reduceTo
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*
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* @return the [destination] map associating the key of each group with the count of elements in the group.
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*
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* @sample samples.collections.Collections.Transformations.groupingByEachCount
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* @sample samples.collections.Grouping.groupingByEachCount
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*/
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@SinceKotlin("1.1")
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public fun <T, K, M : MutableMap<in K, Int>> Grouping<T, K>.eachCountTo(destination: M): M =
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@@ -429,7 +429,7 @@ object Mapping : TemplateGroupBase() {
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using the specified [keySelector] function to extract a key from each ${f.element}.
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"""
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}
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sample("samples.collections.Collections.Transformations.groupingByEachCount")
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sample("samples.collections.Grouping.groupingByEachCount")
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body {
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"""
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