class LinkedHashMap<K, V> : MutableMap<K, V>
typealias LinkedHashMap<K, V> = LinkedHashMap<K, V>
open class LinkedHashMap<K, V> : HashMap<K, V>, MutableMap<K, V>
typealias LinkedHashMap<K, V> = HashMap<K, V>
Hash table based implementation of the MutableMap interface, which additionally preserves the insertion order of entries during the iteration.
The insertion order is preserved by maintaining a doubly-linked list of all of its entries.
Constructs an empty LinkedHashMap instance.
<init>()
<init>(initialCapacity: Int, loadFactor: Float)
<init>(initialCapacity: Int, loadFactor: Float = 0.0f)
<init>(initialCapacity: Int)
Constructs an instance of LinkedHashMap filled with the contents of the specified original map.
<init>(original: Map<out K, V>)
val entries: MutableSet<MutableEntry<K, V>>
val keys: MutableSet<K>
Returns the number of key/value pairs in the map.
val size: Int
open val size: Int
val values: MutableCollection<V>
Removes all elements from this map.
fun clear()
open fun clear()
Returns true if the map contains the specified key.
fun containsKey(key: K): Boolean
open fun containsKey(key: K): Boolean
Returns true if the map maps one or more keys to the specified value.
fun containsValue(value: V): Boolean
open fun containsValue(value: V): Boolean
open fun createEntrySet(): MutableSet<MutableEntry<K, V>>
Returns the value corresponding to the given key, or null if such a key is not present in the map.
fun get(key: K): V?
open operator fun get(key: K): V?
fun isEmpty(): Boolean
fun putAll(from: Map<out K, V>)
Removes the specified key and its corresponding value from this map.
fun remove(key: K): V?
open fun remove(key: K): V?
Indicates whether some other object is "equal to" this one. Implementations must fulfil the following requirements:
fun equals(other: Any?): Boolean
Returns a hash code value for the object. The general contract of hashCode is:
fun hashCode(): Int
Returns a string representation of the object.
fun toString(): String
Returns true if all entries match the given predicate.
fun <K, V> Map<out K, V>.all( predicate: (Entry<K, V>) -> Boolean ): Boolean
Returns true if map has at least one entry.
fun <K, V> Map<out K, V>.any(): Boolean
Returns true if at least one entry matches the given predicate.
fun <K, V> Map<out K, V>.any( predicate: (Entry<K, V>) -> Boolean ): Boolean
Creates an Iterable instance that wraps the original map returning its entries when being iterated.
fun <K, V> Map<out K, V>.asIterable(): Iterable<Entry<K, V>>
Creates a Sequence instance that wraps the original map returning its entries when being iterated.
fun <K, V> Map<out K, V>.asSequence(): Sequence<Entry<K, V>>
Checks if the map contains the given key.
operator fun <K, V> Map<out K, V>.contains(key: K): Boolean
Returns true if the map contains the specified key.
fun <K> Map<out K, *>.containsKey(key: K): Boolean
Returns true if the map maps one or more keys to the specified value.
fun <K, V> Map<K, V>.containsValue(value: V): Boolean
Returns the number of entries in this map.
fun <K, V> Map<out K, V>.count(): Int
Returns the number of entries matching the given predicate.
fun <K, V> Map<out K, V>.count( predicate: (Entry<K, V>) -> Boolean ): Int
Returns a new map containing all key-value pairs matching the given predicate.
fun <K, V> Map<out K, V>.filter( predicate: (Entry<K, V>) -> Boolean ): Map<K, V>
Returns a map containing all key-value pairs with keys matching the given predicate.
fun <K, V> Map<out K, V>.filterKeys( predicate: (K) -> Boolean ): Map<K, V>
Returns a new map containing all key-value pairs not matching the given predicate.
fun <K, V> Map<out K, V>.filterNot( predicate: (Entry<K, V>) -> Boolean ): Map<K, V>
Appends all entries not matching the given predicate into the given destination.
fun <K, V, M : MutableMap<in K, in V>> Map<out K, V>.filterNotTo( destination: M, predicate: (Entry<K, V>) -> Boolean ): M
Appends all entries matching the given predicate into the mutable map given as destination parameter.
fun <K, V, M : MutableMap<in K, in V>> Map<out K, V>.filterTo( destination: M, predicate: (Entry<K, V>) -> Boolean ): M
Returns a map containing all key-value pairs with values matching the given predicate.
fun <K, V> Map<out K, V>.filterValues( predicate: (V) -> Boolean ): Map<K, V>
Returns a single list of all elements yielded from results of transform function being invoked on each entry of original map.
fun <K, V, R> Map<out K, V>.flatMap( transform: (Entry<K, V>) -> Iterable<R> ): List<R>
fun <K, V, R> Map<out K, V>.flatMap( transform: (Entry<K, V>) -> Sequence<R> ): List<R>
Appends all elements yielded from results of transform function being invoked on each entry of original map, to the given destination.
fun <K, V, R, C : MutableCollection<in R>> Map<out K, V>.flatMapTo( destination: C, transform: (Entry<K, V>) -> Iterable<R> ): C
fun <K, V, R, C : MutableCollection<in R>> Map<out K, V>.flatMapTo( destination: C, transform: (Entry<K, V>) -> Sequence<R> ): C
Performs the given action on each entry.
fun <K, V> Map<out K, V>.forEach( action: (Entry<K, V>) -> Unit)
Returns the value corresponding to the given key, or null if such a key is not present in the map.
operator fun <K, V> Map<out K, V>.get(key: K): V?
Returns the value for the given key, or the result of the defaultValue function if there was no entry for the given key.
fun <K, V> Map<K, V>.getOrElse( key: K, defaultValue: () -> V ): V
Returns the value for the given key. If the key is not found in the map, calls the defaultValue function, puts its result into the map under the given key and returns it.
fun <K, V> MutableMap<K, V>.getOrPut( key: K, defaultValue: () -> V ): V
Returns the value for the given key or throws an exception if there is no such key in the map.
fun <K, V> Map<K, V>.getValue(key: K): V
Returns this map if it's not empty or the result of calling defaultValue function if the map is empty.
fun <M, R> M.ifEmpty( defaultValue: () -> R ): R where M : Map<*, *>, M : R
Returns true if this map is not empty.
fun <K, V> Map<out K, V>.isNotEmpty(): Boolean
Returns true if this nullable map is either null or empty.
fun <K, V> Map<out K, V>?.isNullOrEmpty(): Boolean
Returns a list containing the results of applying the given transform function to each entry in the original map.
fun <K, V, R> Map<out K, V>.map( transform: (Entry<K, V>) -> R ): List<R>
Populates the given destination map with entries having the keys obtained by applying the transform function to each entry in this Map and the values of this map.
fun <K, V, R, M : MutableMap<in R, in V>> Map<out K, V>.mapKeysTo( destination: M, transform: (Entry<K, V>) -> R ): M
Returns a list containing only the non-null results of applying the given transform function to each entry in the original map.
fun <K, V, R : Any> Map<out K, V>.mapNotNull( transform: (Entry<K, V>) -> R? ): List<R>
Applies the given transform function to each entry in the original map and appends only the non-null results to the given destination.
fun <K, V, R : Any, C : MutableCollection<in R>> Map<out K, V>.mapNotNullTo( destination: C, transform: (Entry<K, V>) -> R? ): C
Applies the given transform function to each entry of the original map and appends the results to the given destination.
fun <K, V, R, C : MutableCollection<in R>> Map<out K, V>.mapTo( destination: C, transform: (Entry<K, V>) -> R ): C
Populates the given destination map with entries having the keys of this map and the values obtained by applying the transform function to each entry in this Map.
fun <K, V, R, M : MutableMap<in K, in R>> Map<out K, V>.mapValuesTo( destination: M, transform: (Entry<K, V>) -> R ): M
fun <K, V, R : Comparable<R>> Map<out K, V>.maxBy( selector: (Entry<K, V>) -> R ): Entry<K, V>?
Returns the first entry yielding the largest value of the given function or null if there are no entries.
fun <K, V, R : Comparable<R>> Map<out K, V>.maxByOrNull( selector: (Entry<K, V>) -> R ): Entry<K, V>?
Returns the largest value among all values produced by selector function applied to each entry in the map.
fun <K, V> Map<out K, V>.maxOf( selector: (Entry<K, V>) -> Double ): Double
fun <K, V> Map<out K, V>.maxOf( selector: (Entry<K, V>) -> Float ): Float
fun <K, V, R : Comparable<R>> Map<out K, V>.maxOf( selector: (Entry<K, V>) -> R ): R
Returns the largest value among all values produced by selector function applied to each entry in the map or null if there are no entries.
fun <K, V> Map<out K, V>.maxOfOrNull( selector: (Entry<K, V>) -> Double ): Double?
fun <K, V> Map<out K, V>.maxOfOrNull( selector: (Entry<K, V>) -> Float ): Float?
fun <K, V, R : Comparable<R>> Map<out K, V>.maxOfOrNull( selector: (Entry<K, V>) -> R ): R?
Returns the largest value according to the provided comparator among all values produced by selector function applied to each entry in the map.
fun <K, V, R> Map<out K, V>.maxOfWith( comparator: Comparator<in R>, selector: (Entry<K, V>) -> R ): R
Returns the largest value according to the provided comparator among all values produced by selector function applied to each entry in the map or null if there are no entries.
fun <K, V, R> Map<out K, V>.maxOfWithOrNull( comparator: Comparator<in R>, selector: (Entry<K, V>) -> R ): R?
fun <K, V> Map<out K, V>.maxWith( comparator: Comparator<in Entry<K, V>> ): Entry<K, V>?
Returns the first entry having the largest value according to the provided comparator or null if there are no entries.
fun <K, V> Map<out K, V>.maxWithOrNull( comparator: Comparator<in Entry<K, V>> ): Entry<K, V>?
fun <K, V, R : Comparable<R>> Map<out K, V>.minBy( selector: (Entry<K, V>) -> R ): Entry<K, V>?
Returns the first entry yielding the smallest value of the given function or null if there are no entries.
fun <K, V, R : Comparable<R>> Map<out K, V>.minByOrNull( selector: (Entry<K, V>) -> R ): Entry<K, V>?
Returns the smallest value among all values produced by selector function applied to each entry in the map.
fun <K, V> Map<out K, V>.minOf( selector: (Entry<K, V>) -> Double ): Double
fun <K, V> Map<out K, V>.minOf( selector: (Entry<K, V>) -> Float ): Float
fun <K, V, R : Comparable<R>> Map<out K, V>.minOf( selector: (Entry<K, V>) -> R ): R
Returns the smallest value among all values produced by selector function applied to each entry in the map or null if there are no entries.
fun <K, V> Map<out K, V>.minOfOrNull( selector: (Entry<K, V>) -> Double ): Double?
fun <K, V> Map<out K, V>.minOfOrNull( selector: (Entry<K, V>) -> Float ): Float?
fun <K, V, R : Comparable<R>> Map<out K, V>.minOfOrNull( selector: (Entry<K, V>) -> R ): R?
Returns the smallest value according to the provided comparator among all values produced by selector function applied to each entry in the map.
fun <K, V, R> Map<out K, V>.minOfWith( comparator: Comparator<in R>, selector: (Entry<K, V>) -> R ): R
Returns the smallest value according to the provided comparator among all values produced by selector function applied to each entry in the map or null if there are no entries.
fun <K, V, R> Map<out K, V>.minOfWithOrNull( comparator: Comparator<in R>, selector: (Entry<K, V>) -> R ): R?
Returns a map containing all entries of the original map except the entry with the given key.
operator fun <K, V> Map<out K, V>.minus(key: K): Map<K, V>
Returns a map containing all entries of the original map except those entries the keys of which are contained in the given keys collection.
operator fun <K, V> Map<out K, V>.minus( keys: Iterable<K> ): Map<K, V>
Returns a map containing all entries of the original map except those entries the keys of which are contained in the given keys array.
operator fun <K, V> Map<out K, V>.minus( keys: Array<out K> ): Map<K, V>
Returns a map containing all entries of the original map except those entries the keys of which are contained in the given keys sequence.
operator fun <K, V> Map<out K, V>.minus( keys: Sequence<K> ): Map<K, V>
Removes the entry with the given key from this mutable map.
operator fun <K, V> MutableMap<K, V>.minusAssign(key: K)
Removes all entries the keys of which are contained in the given keys collection from this mutable map.
operator fun <K, V> MutableMap<K, V>.minusAssign( keys: Iterable<K>)
Removes all entries the keys of which are contained in the given keys array from this mutable map.
operator fun <K, V> MutableMap<K, V>.minusAssign( keys: Array<out K>)
Removes all entries from the keys of which are contained in the given keys sequence from this mutable map.
operator fun <K, V> MutableMap<K, V>.minusAssign( keys: Sequence<K>)
fun <K, V> Map<out K, V>.minWith( comparator: Comparator<in Entry<K, V>> ): Entry<K, V>?
Returns the first entry having the smallest value according to the provided comparator or null if there are no entries.
fun <K, V> Map<out K, V>.minWithOrNull( comparator: Comparator<in Entry<K, V>> ): Entry<K, V>?
Returns true if the map has no entries.
fun <K, V> Map<out K, V>.none(): Boolean
Returns true if no entries match the given predicate.
fun <K, V> Map<out K, V>.none( predicate: (Entry<K, V>) -> Boolean ): Boolean
Performs the given action on each entry and returns the map itself afterwards.
fun <K, V, M : Map<out K, V>> M.onEach( action: (Entry<K, V>) -> Unit ): M
Performs the given action on each entry, providing sequential index with the entry, and returns the map itself afterwards.
fun <K, V, M : Map<out K, V>> M.onEachIndexed( action: (index: Int, Entry<K, V>) -> Unit ): M
Creates a new read-only map by replacing or adding an entry to this map from a given key-value pair.
operator fun <K, V> Map<out K, V>.plus( pair: Pair<K, V> ): Map<K, V>
Creates a new read-only map by replacing or adding entries to this map from a given collection of key-value pairs.
operator fun <K, V> Map<out K, V>.plus( pairs: Iterable<Pair<K, V>> ): Map<K, V>
Creates a new read-only map by replacing or adding entries to this map from a given array of key-value pairs.
operator fun <K, V> Map<out K, V>.plus( pairs: Array<out Pair<K, V>> ): Map<K, V>
Creates a new read-only map by replacing or adding entries to this map from a given sequence of key-value pairs.
operator fun <K, V> Map<out K, V>.plus( pairs: Sequence<Pair<K, V>> ): Map<K, V>
Creates a new read-only map by replacing or adding entries to this map from another map.
operator fun <K, V> Map<out K, V>.plus( map: Map<out K, V> ): Map<K, V>
Appends or replaces the given pair in this mutable map.
operator fun <K, V> MutableMap<in K, in V>.plusAssign( pair: Pair<K, V>)
Appends or replaces all pairs from the given collection of pairs in this mutable map.
operator fun <K, V> MutableMap<in K, in V>.plusAssign( pairs: Iterable<Pair<K, V>>)
Appends or replaces all pairs from the given array of pairs in this mutable map.
operator fun <K, V> MutableMap<in K, in V>.plusAssign( pairs: Array<out Pair<K, V>>)
Appends or replaces all pairs from the given sequence of pairs in this mutable map.
operator fun <K, V> MutableMap<in K, in V>.plusAssign( pairs: Sequence<Pair<K, V>>)
Appends or replaces all entries from the given map in this mutable map.
operator fun <K, V> MutableMap<in K, in V>.plusAssign( map: Map<K, V>)
Puts all the given pairs into this MutableMap with the first component in the pair being the key and the second the value.
fun <K, V> MutableMap<in K, in V>.putAll( pairs: Array<out Pair<K, V>>)
Puts all the elements of the given collection into this MutableMap with the first component in the pair being the key and the second the value.
fun <K, V> MutableMap<in K, in V>.putAll( pairs: Iterable<Pair<K, V>>)
Puts all the elements of the given sequence into this MutableMap with the first component in the pair being the key and the second the value.
fun <K, V> MutableMap<in K, in V>.putAll( pairs: Sequence<Pair<K, V>>)
Removes the specified key and its corresponding value from this map.
fun <K, V> MutableMap<out K, V>.remove(key: K): V?
Allows to use the index operator for storing values in a mutable map.
operator fun <K, V> MutableMap<K, V>.set(key: K, value: V)
Stores the value of the property for the given object in this mutable map.
operator fun <V> MutableMap<in String, in V>.setValue( thisRef: Any?, property: KProperty<*>, value: V)
Returns a List containing all key-value pairs.
fun <K, V> Map<out K, V>.toList(): List<Pair<K, V>>
Returns a new read-only map containing all key-value pairs from the original map.
fun <K, V> Map<out K, V>.toMap(): Map<K, V>
Populates and returns the destination mutable map with key-value pairs from the given map.
fun <K, V, M : MutableMap<in K, in V>> Map<out K, V>.toMap( destination: M ): M
Returns a new mutable map containing all key-value pairs from the original map.
fun <K, V> Map<out K, V>.toMutableMap(): MutableMap<K, V>
Returns a wrapper of this read-only map, having the implicit default value provided with the specified function defaultValue.
fun <K, V> Map<K, V>.withDefault( defaultValue: (key: K) -> V ): Map<K, V>
Returns a wrapper of this mutable map, having the implicit default value provided with the specified function defaultValue.
fun <K, V> MutableMap<K, V>.withDefault( defaultValue: (key: K) -> V ): MutableMap<K, V>
© 2010–2020 JetBrains s.r.o. and Kotlin Programming Language contributors
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-linked-hash-map/index.html