kotlin-stdlib / kotlin / BooleanArray

BooleanArray

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class BooleanArray

An array of booleans. When targeting the JVM, instances of this class are represented as boolean[].

Constructors

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<init>

Creates a new array of the specified size, where each element is calculated by calling the specified init function.

<init>(size: Int, init: (Int) -> Boolean)

Creates a new array of the specified size, with all elements initialized to false.

<init>(size: Int)

Properties

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size

Returns the number of elements in the array.

val size: Int

Functions

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get

Returns the array element at the given index. This method can be called using the index operator.

operator fun get(index: Int): Boolean
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iterator

Creates an iterator over the elements of the array.

operator fun iterator(): BooleanIterator
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set

Sets the element at the given index to the given value. This method can be called using the index operator.

operator fun set(index: Int, value: Boolean)

Extension Properties

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indices

Returns the range of valid indices for the array.

val BooleanArray.indices: IntRange
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lastIndex

Returns the last valid index for the array.

val BooleanArray.lastIndex: Int

Extension Functions

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all

Returns true if all elements match the given predicate.

fun BooleanArray.all(
    predicate: (Boolean) -> Boolean
): Boolean
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any

Returns true if array has at least one element.

fun BooleanArray.any(): Boolean

Returns true if at least one element matches the given predicate.

fun BooleanArray.any(
    predicate: (Boolean) -> Boolean
): Boolean
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asIterable

Creates an Iterable instance that wraps the original array returning its elements when being iterated.

fun BooleanArray.asIterable(): Iterable<Boolean>
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asSequence

Creates a Sequence instance that wraps the original array returning its elements when being iterated.

fun BooleanArray.asSequence(): Sequence<Boolean>
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associate

Returns a Map containing key-value pairs provided by transform function applied to elements of the given array.

fun <K, V> BooleanArray.associate(
    transform: (Boolean) -> Pair<K, V>
): Map<K, V>
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associateBy

Returns a Map containing the elements from the given array indexed by the key returned from keySelector function applied to each element.

fun <K> BooleanArray.associateBy(
    keySelector: (Boolean) -> K
): Map<K, Boolean>

Returns a Map containing the values provided by valueTransform and indexed by keySelector functions applied to elements of the given array.

fun <K, V> BooleanArray.associateBy(
    keySelector: (Boolean) -> K,
    valueTransform: (Boolean) -> V
): Map<K, V>
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associateByTo

Populates and returns the destination mutable map with key-value pairs, where key is provided by the keySelector function applied to each element of the given array and value is the element itself.

fun <K, M : MutableMap<in K, in Boolean>> BooleanArray.associateByTo(
    destination: M,
    keySelector: (Boolean) -> K
): M

Populates and returns the destination mutable map with key-value pairs, where key is provided by the keySelector function and and value is provided by the valueTransform function applied to elements of the given array.

fun <K, V, M : MutableMap<in K, in V>> BooleanArray.associateByTo(
    destination: M,
    keySelector: (Boolean) -> K,
    valueTransform: (Boolean) -> V
): M
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associateTo

Populates and returns the destination mutable map with key-value pairs provided by transform function applied to each element of the given array.

fun <K, V, M : MutableMap<in K, in V>> BooleanArray.associateTo(
    destination: M,
    transform: (Boolean) -> Pair<K, V>
): M
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component1

Returns 1st element from the array.

operator fun BooleanArray.component1(): Boolean
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component2

Returns 2nd element from the array.

operator fun BooleanArray.component2(): Boolean
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component3

Returns 3rd element from the array.

operator fun BooleanArray.component3(): Boolean
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component4

Returns 4th element from the array.

operator fun BooleanArray.component4(): Boolean
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component5

Returns 5th element from the array.

operator fun BooleanArray.component5(): Boolean
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contains

Returns true if element is found in the array.

operator fun BooleanArray.contains(element: Boolean): Boolean
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count

Returns the number of elements in this array.

fun BooleanArray.count(): Int

Returns the number of elements matching the given predicate.

fun BooleanArray.count(predicate: (Boolean) -> Boolean): Int
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distinct

Returns a list containing only distinct elements from the given array.

fun BooleanArray.distinct(): List<Boolean>
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distinctBy

Returns a list containing only elements from the given array having distinct keys returned by the given selector function.

fun <K> BooleanArray.distinctBy(
    selector: (Boolean) -> K
): List<Boolean>
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drop

Returns a list containing all elements except first n elements.

fun BooleanArray.drop(n: Int): List<Boolean>
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dropLast

Returns a list containing all elements except last n elements.

fun BooleanArray.dropLast(n: Int): List<Boolean>
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dropLastWhile

Returns a list containing all elements except last elements that satisfy the given predicate.

fun BooleanArray.dropLastWhile(
    predicate: (Boolean) -> Boolean
): List<Boolean>
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dropWhile

Returns a list containing all elements except first elements that satisfy the given predicate.

fun BooleanArray.dropWhile(
    predicate: (Boolean) -> Boolean
): List<Boolean>
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elementAtOrElse

Returns an element at the given index or the result of calling the defaultValue function if the index is out of bounds of this array.

fun BooleanArray.elementAtOrElse(
    index: Int,
    defaultValue: (Int) -> Boolean
): Boolean
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elementAtOrNull

Returns an element at the given index or null if the index is out of bounds of this array.

fun BooleanArray.elementAtOrNull(index: Int): Boolean?
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filter

Returns a list containing only elements matching the given predicate.

fun BooleanArray.filter(
    predicate: (Boolean) -> Boolean
): List<Boolean>
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filterIndexed

Returns a list containing only elements matching the given predicate.

fun BooleanArray.filterIndexed(
    predicate: (index: Int, Boolean) -> Boolean
): List<Boolean>
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filterIndexedTo

Appends all elements matching the given predicate to the given destination.

fun <C : MutableCollection<in Boolean>> BooleanArray.filterIndexedTo(
    destination: C,
    predicate: (index: Int, Boolean) -> Boolean
): C
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filterNot

Returns a list containing all elements not matching the given predicate.

fun BooleanArray.filterNot(
    predicate: (Boolean) -> Boolean
): List<Boolean>
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filterNotTo

Appends all elements not matching the given predicate to the given destination.

fun <C : MutableCollection<in Boolean>> BooleanArray.filterNotTo(
    destination: C,
    predicate: (Boolean) -> Boolean
): C
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filterTo

Appends all elements matching the given predicate to the given destination.

fun <C : MutableCollection<in Boolean>> BooleanArray.filterTo(
    destination: C,
    predicate: (Boolean) -> Boolean
): C
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find

Returns the first element matching the given predicate, or null if no such element was found.

fun BooleanArray.find(
    predicate: (Boolean) -> Boolean
): Boolean?
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findLast

Returns the last element matching the given predicate, or null if no such element was found.

fun BooleanArray.findLast(
    predicate: (Boolean) -> Boolean
): Boolean?
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first

Returns first element.

fun BooleanArray.first(): Boolean

Returns the first element matching the given predicate.

fun BooleanArray.first(
    predicate: (Boolean) -> Boolean
): Boolean
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firstOrNull

Returns the first element, or null if the array is empty.

fun BooleanArray.firstOrNull(): Boolean?

Returns the first element matching the given predicate, or null if element was not found.

fun BooleanArray.firstOrNull(
    predicate: (Boolean) -> Boolean
): Boolean?
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flatMap

Returns a single list of all elements yielded from results of transform function being invoked on each element of original array.

fun <R> BooleanArray.flatMap(
    transform: (Boolean) -> Iterable<R>
): List<R>
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flatMapTo

Appends all elements yielded from results of transform function being invoked on each element of original array, to the given destination.

fun <R, C : MutableCollection<in R>> BooleanArray.flatMapTo(
    destination: C,
    transform: (Boolean) -> Iterable<R>
): C
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fold

Accumulates value starting with initial value and applying operation from left to right to current accumulator value and each element.

fun <R> BooleanArray.fold(
    initial: R,
    operation: (acc: R, Boolean) -> R
): R
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foldIndexed

Accumulates value starting with initial value and applying operation from left to right to current accumulator value and each element with its index in the original array.

fun <R> BooleanArray.foldIndexed(
    initial: R,
    operation: (index: Int, acc: R, Boolean) -> R
): R
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foldRight

Accumulates value starting with initial value and applying operation from right to left to each element and current accumulator value.

fun <R> BooleanArray.foldRight(
    initial: R,
    operation: (Boolean, acc: R) -> R
): R
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foldRightIndexed

Accumulates value starting with initial value and applying operation from right to left to each element with its index in the original array and current accumulator value.

fun <R> BooleanArray.foldRightIndexed(
    initial: R,
    operation: (index: Int, Boolean, acc: R) -> R
): R
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forEach

Performs the given action on each element.

fun BooleanArray.forEach(action: (Boolean) -> Unit)
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forEachIndexed

Performs the given action on each element, providing sequential index with the element.

fun BooleanArray.forEachIndexed(
    action: (index: Int, Boolean) -> Unit)
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getOrElse

Returns an element at the given index or the result of calling the defaultValue function if the index is out of bounds of this array.

fun BooleanArray.getOrElse(
    index: Int,
    defaultValue: (Int) -> Boolean
): Boolean
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getOrNull

Returns an element at the given index or null if the index is out of bounds of this array.

fun BooleanArray.getOrNull(index: Int): Boolean?
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groupBy

Groups elements of the original array by the key returned by the given keySelector function applied to each element and returns a map where each group key is associated with a list of corresponding elements.

fun <K> BooleanArray.groupBy(
    keySelector: (Boolean) -> K
): Map<K, List<Boolean>>

Groups values returned by the valueTransform function applied to each element of the original array by the key returned by the given keySelector function applied to the element and returns a map where each group key is associated with a list of corresponding values.

fun <K, V> BooleanArray.groupBy(
    keySelector: (Boolean) -> K,
    valueTransform: (Boolean) -> V
): Map<K, List<V>>
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groupByTo

Groups elements of the original array 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.

fun <K, M : MutableMap<in K, MutableList<Boolean>>> BooleanArray.groupByTo(
    destination: M,
    keySelector: (Boolean) -> K
): M

Groups values returned by the valueTransform function applied to each element of the original array 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.

fun <K, V, M : MutableMap<in K, MutableList<V>>> BooleanArray.groupByTo(
    destination: M,
    keySelector: (Boolean) -> K,
    valueTransform: (Boolean) -> V
): M
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indexOf

Returns first index of element, or -1 if the array does not contain element.

fun BooleanArray.indexOf(element: Boolean): Int
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indexOfFirst

Returns index of the first element matching the given predicate, or -1 if the array does not contain such element.

fun BooleanArray.indexOfFirst(
    predicate: (Boolean) -> Boolean
): Int
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indexOfLast

Returns index of the last element matching the given predicate, or -1 if the array does not contain such element.

fun BooleanArray.indexOfLast(
    predicate: (Boolean) -> Boolean
): Int
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intersect

Returns a set containing all elements that are contained by both this array and the specified collection.

infix fun BooleanArray.intersect(
    other: Iterable<Boolean>
): Set<Boolean>
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isEmpty

Returns true if the array is empty.

fun BooleanArray.isEmpty(): Boolean
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isNotEmpty

Returns true if the array is not empty.

fun BooleanArray.isNotEmpty(): Boolean
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joinTo

Appends the string from all the elements separated using separator and using the given prefix and postfix if supplied.

fun <A : Appendable> BooleanArray.joinTo(
    buffer: A,
    separator: CharSequence = ", ",
    prefix: CharSequence = "",
    postfix: CharSequence = "",
    limit: Int = -1,
    truncated: CharSequence = "...",
    transform: ((Boolean) -> CharSequence)? = null
): A
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joinToString

Creates a string from all the elements separated using separator and using the given prefix and postfix if supplied.

fun BooleanArray.joinToString(
    separator: CharSequence = ", ",
    prefix: CharSequence = "",
    postfix: CharSequence = "",
    limit: Int = -1,
    truncated: CharSequence = "...",
    transform: ((Boolean) -> CharSequence)? = null
): String
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last

Returns the last element.

fun BooleanArray.last(): Boolean

Returns the last element matching the given predicate.

fun BooleanArray.last(
    predicate: (Boolean) -> Boolean
): Boolean
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lastIndexOf

Returns last index of element, or -1 if the array does not contain element.

fun BooleanArray.lastIndexOf(element: Boolean): Int
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lastOrNull

Returns the last element, or null if the array is empty.

fun BooleanArray.lastOrNull(): Boolean?

Returns the last element matching the given predicate, or null if no such element was found.

fun BooleanArray.lastOrNull(
    predicate: (Boolean) -> Boolean
): Boolean?
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map

Returns a list containing the results of applying the given transform function to each element in the original array.

fun <R> BooleanArray.map(transform: (Boolean) -> R): List<R>
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mapIndexed

Returns a list containing the results of applying the given transform function to each element and its index in the original array.

fun <R> BooleanArray.mapIndexed(
    transform: (index: Int, Boolean) -> R
): List<R>
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mapIndexedTo

Applies the given transform function to each element and its index in the original array and appends the results to the given destination.

fun <R, C : MutableCollection<in R>> BooleanArray.mapIndexedTo(
    destination: C,
    transform: (index: Int, Boolean) -> R
): C
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mapTo

Applies the given transform function to each element of the original array and appends the results to the given destination.

fun <R, C : MutableCollection<in R>> BooleanArray.mapTo(
    destination: C,
    transform: (Boolean) -> R
): C
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maxBy

Returns the first element yielding the largest value of the given function or null if there are no elements.

fun <R : Comparable<R>> BooleanArray.maxBy(
    selector: (Boolean) -> R
): Boolean?
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maxWith

Returns the first element having the largest value according to the provided comparator or null if there are no elements.

fun BooleanArray.maxWith(
    comparator: Comparator<in Boolean>
): Boolean?
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minBy

Returns the first element yielding the smallest value of the given function or null if there are no elements.

fun <R : Comparable<R>> BooleanArray.minBy(
    selector: (Boolean) -> R
): Boolean?
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minWith

Returns the first element having the smallest value according to the provided comparator or null if there are no elements.

fun BooleanArray.minWith(
    comparator: Comparator<in Boolean>
): Boolean?
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none

Returns true if the array has no elements.

fun BooleanArray.none(): Boolean

Returns true if no elements match the given predicate.

fun BooleanArray.none(
    predicate: (Boolean) -> Boolean
): Boolean
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partition

Splits the original array into pair of lists, where first list contains elements for which predicate yielded true, while second list contains elements for which predicate yielded false.

fun BooleanArray.partition(
    predicate: (Boolean) -> Boolean
): Pair<List<Boolean>, List<Boolean>>
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random

Returns a random element from this array.

fun BooleanArray.random(): Boolean

Returns a random element from this array using the specified source of randomness.

fun BooleanArray.random(random: Random): Boolean
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randomOrNull

Returns a random element from this array, or null if this array is empty.

fun BooleanArray.randomOrNull(): Boolean?

Returns a random element from this array using the specified source of randomness, or null if this array is empty.

fun BooleanArray.randomOrNull(random: Random): Boolean?
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reduce

Accumulates value starting with the first element and applying operation from left to right to current accumulator value and each element.

fun BooleanArray.reduce(
    operation: (acc: Boolean, Boolean) -> Boolean
): Boolean
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reduceIndexed

Accumulates value starting with the first element and applying operation from left to right to current accumulator value and each element with its index in the original array.

fun BooleanArray.reduceIndexed(
    operation: (index: Int, acc: Boolean, Boolean) -> Boolean
): Boolean
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reduceOrNull

Accumulates value starting with the first element and applying operation from left to right to current accumulator value and each element. Returns null if the array is empty.

fun BooleanArray.reduceOrNull(
    operation: (acc: Boolean, Boolean) -> Boolean
): Boolean?
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reduceRight

Accumulates value starting with last element and applying operation from right to left to each element and current accumulator value.

fun BooleanArray.reduceRight(
    operation: (Boolean, acc: Boolean) -> Boolean
): Boolean
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reduceRightIndexed

Accumulates value starting with last element and applying operation from right to left to each element with its index in the original array and current accumulator value.

fun BooleanArray.reduceRightIndexed(
    operation: (index: Int, Boolean, acc: Boolean) -> Boolean
): Boolean
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reduceRightOrNull

Accumulates value starting with last element and applying operation from right to left to each element and current accumulator value. Returns null if the array is empty.

fun BooleanArray.reduceRightOrNull(
    operation: (Boolean, acc: Boolean) -> Boolean
): Boolean?
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reverse

Reverses elements in the array in-place.

fun BooleanArray.reverse()
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reversed

Returns a list with elements in reversed order.

fun BooleanArray.reversed(): List<Boolean>
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reversedArray

Returns an array with elements of this array in reversed order.

fun BooleanArray.reversedArray(): BooleanArray
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scan

Returns a list containing successive accumulation values generated by applying operation from left to right to each element and current accumulator value that starts with initial value.

fun <R> BooleanArray.scan(
    initial: R,
    operation: (acc: R, Boolean) -> R
): List<R>
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scanIndexed

Returns a list containing successive accumulation values generated by applying operation from left to right to each element, its index in the original array and current accumulator value that starts with initial value.

fun <R> BooleanArray.scanIndexed(
    initial: R,
    operation: (index: Int, acc: R, Boolean) -> R
): List<R>
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scanReduce

Returns a list containing successive accumulation values generated by applying operation from left to right to each element and current accumulator value that starts with the first element of this array.

fun BooleanArray.scanReduce(
    operation: (acc: Boolean, Boolean) -> Boolean
): List<Boolean>
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scanReduceIndexed

Returns a list containing successive accumulation values generated by applying operation from left to right to each element, its index in the original array and current accumulator value that starts with the first element of this array.

fun BooleanArray.scanReduceIndexed(
    operation: (index: Int, acc: Boolean, Boolean) -> Boolean
): List<Boolean>
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single

Returns the single element, or throws an exception if the array is empty or has more than one element.

fun BooleanArray.single(): Boolean

Returns the single element matching the given predicate, or throws exception if there is no or more than one matching element.

fun BooleanArray.single(
    predicate: (Boolean) -> Boolean
): Boolean
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singleOrNull

Returns single element, or null if the array is empty or has more than one element.

fun BooleanArray.singleOrNull(): Boolean?

Returns the single element matching the given predicate, or null if element was not found or more than one element was found.

fun BooleanArray.singleOrNull(
    predicate: (Boolean) -> Boolean
): Boolean?
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slice

Returns a list containing elements at indices in the specified indices range.

fun BooleanArray.slice(indices: IntRange): List<Boolean>

Returns a list containing elements at specified indices.

fun BooleanArray.slice(indices: Iterable<Int>): List<Boolean>
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sliceArray

Returns an array containing elements of this array at specified indices.

fun BooleanArray.sliceArray(
    indices: Collection<Int>
): BooleanArray

Returns an array containing elements at indices in the specified indices range.

fun BooleanArray.sliceArray(indices: IntRange): BooleanArray
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sortedBy

Returns a list of all elements sorted according to natural sort order of the value returned by specified selector function.

fun <R : Comparable<R>> BooleanArray.sortedBy(
    selector: (Boolean) -> R?
): List<Boolean>
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sortedByDescending

Returns a list of all elements sorted descending according to natural sort order of the value returned by specified selector function.

fun <R : Comparable<R>> BooleanArray.sortedByDescending(
    selector: (Boolean) -> R?
): List<Boolean>
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sortedWith

Returns a list of all elements sorted according to the specified comparator.

fun BooleanArray.sortedWith(
    comparator: Comparator<in Boolean>
): List<Boolean>
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subtract

Returns a set containing all elements that are contained by this array and not contained by the specified collection.

infix fun BooleanArray.subtract(
    other: Iterable<Boolean>
): Set<Boolean>
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sumBy

Returns the sum of all values produced by selector function applied to each element in the array.

fun BooleanArray.sumBy(selector: (Boolean) -> Int): Int
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sumByDouble

Returns the sum of all values produced by selector function applied to each element in the array.

fun BooleanArray.sumByDouble(
    selector: (Boolean) -> Double
): Double
Common
JVM
JS
Native
1.0

take

Returns a list containing first n elements.

fun BooleanArray.take(n: Int): List<Boolean>
Common
JVM
JS
Native
1.0

takeLast

Returns a list containing last n elements.

fun BooleanArray.takeLast(n: Int): List<Boolean>
Common
JVM
JS
Native
1.0

takeLastWhile

Returns a list containing last elements satisfying the given predicate.

fun BooleanArray.takeLastWhile(
    predicate: (Boolean) -> Boolean
): List<Boolean>
Common
JVM
JS
Native
1.0

takeWhile

Returns a list containing first elements satisfying the given predicate.

fun BooleanArray.takeWhile(
    predicate: (Boolean) -> Boolean
): List<Boolean>
Common
JVM
JS
Native
1.0

toCollection

Appends all elements to the given destination collection.

fun <C : MutableCollection<in Boolean>> BooleanArray.toCollection(
    destination: C
): C
Common
JVM
JS
Native
1.0

toHashSet

Returns a HashSet of all elements.

fun BooleanArray.toHashSet(): HashSet<Boolean>
Common
JVM
JS
Native
1.0

toList

Returns a List containing all elements.

fun BooleanArray.toList(): List<Boolean>
Common
JVM
JS
Native
1.0

toMutableList

Returns a MutableList filled with all elements of this array.

fun BooleanArray.toMutableList(): MutableList<Boolean>
Common
JVM
JS
Native
1.0

toMutableSet

Returns a mutable set containing all distinct elements from the given array.

fun BooleanArray.toMutableSet(): MutableSet<Boolean>
Common
JVM
JS
Native
1.0

toSet

Returns a Set of all elements.

fun BooleanArray.toSet(): Set<Boolean>
JVM
1.0

toSortedSet

Returns a SortedSet of all elements.

fun BooleanArray.toSortedSet(): SortedSet<Boolean>
Common
JVM
JS
Native
1.0

union

Returns a set containing all distinct elements from both collections.

infix fun BooleanArray.union(
    other: Iterable<Boolean>
): Set<Boolean>
Common
JVM
JS
Native
1.0

withIndex

Returns a lazy Iterable that wraps each element of the original array into an IndexedValue containing the index of that element and the element itself.

fun BooleanArray.withIndex(): Iterable<IndexedValue<Boolean>>
Common
JVM
JS
Native
1.0

zip

Returns a list of pairs built from the elements of this array and the other array with the same index. The returned list has length of the shortest collection.

infix fun <R> any_array<R>.zip(
    other: Array<out R>
): List<Pair<Boolean, R>>

Returns a list of values built from the elements of this array and the other array with the same index using the provided transform function applied to each pair of elements. The returned list has length of the shortest collection.

fun <R, V> BooleanArray.zip(
    other: Array<out R>,
    transform: (a: Boolean, b: R) -> V
): List<V>

Returns a list of pairs built from the elements of this collection and other array with the same index. The returned list has length of the shortest collection.

infix fun <R> BooleanArray.zip(
    other: Iterable<R>
): List<Pair<Boolean, R>>

Returns a list of values built from the elements of this array and the other collection with the same index using the provided transform function applied to each pair of elements. The returned list has length of the shortest collection.

fun <R, V> BooleanArray.zip(
    other: Iterable<R>,
    transform: (a: Boolean, b: R) -> V
): List<V>

Returns a list of values built from the elements of this array and the other array with the same index using the provided transform function applied to each pair of elements. The returned list has length of the shortest array.

fun <V> BooleanArray.zip(
    other: BooleanArray,
    transform: (a: Boolean, b: Boolean) -> V
): List<V>