# MutableLongSet # MutableLongSet Artifact:[androidx.collection:collection](https://developer.android.com/jetpack/androidx/releases/collection) [View Source](https://cs.android.com/search?q=file:androidx/collection/LongSet.kt+class:androidx.collection.MutableLongSet) Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) *** ** * ** *** Kotlin\|[Java](https://developer.android.com/reference/androidx/collection/MutableLongSet "View this page in Java") Common/AllAndroid/JVMNative/C/iOSJavaScript - Cmn ``` class MutableLongSet : LongSet ``` |---|---|-------------------------------------------------------------------------------------------------------------------------| | [kotlin.Any](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-any/index.html) ||| | ↳ | [androidx.collection.LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) || | | ↳ | [androidx.collection.MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet) | *** ** * ** *** [MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet)is a container with a[MutableSet](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/-mutable-set/index.html)-like interface based on a flat hash table implementation. The underlying implementation is designed to avoid all allocations on insertion, removal, retrieval, and iteration. Allocations may still happen on insertion when the underlying storage needs to grow to accommodate newly added elements to the set. This implementation makes no guarantee as to the order of the elements stored, nor does it make guarantees that the order remains constant over time. This implementation is not thread-safe: if multiple threads access this container concurrently, and one or more threads modify the structure of the set (insertion or removal for instance), the calling code must provide the appropriate synchronization. Concurrent reads are however safe. ## Summary | ### Public constructors | |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----| | [MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#MutableLongSet(kotlin.Int))`(initialCapacity: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`)` Creates a new[MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet) | Cmn | | ### Public functions | |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [add](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#add(kotlin.Long))`(element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`)` Adds the specified element to the set. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [addAll](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#addAll(kotlin.LongArray))`(elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html)`)` Adds all the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#addAll(kotlin.LongArray))into this set. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [addAll](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#addAll(androidx.collection.LongSet))`(elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)`)` Adds all the elements in the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#addAll(androidx.collection.LongSet))set into this set. | Cmn | | [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [clear](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#clear())`()` Removes all elements from this set. | Cmn | | `operator `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [minusAssign](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(kotlin.Long))`(element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`)` Removes the specified[element](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(kotlin.Long))from the set if it is present. | Cmn | | `operator `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [minusAssign](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(kotlin.LongArray))`(elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html)`)` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(kotlin.LongArray))from the set, if present. | Cmn | | `operator `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [minusAssign](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(androidx.collection.LongSet))`(elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)`)` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(androidx.collection.LongSet))from the set, if present. | Cmn | | `operator `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [plusAssign](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(kotlin.Long))`(element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`)` Adds the specified element to the set. | Cmn | | `operator `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [plusAssign](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(kotlin.LongArray))`(elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html)`)` Adds all the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(kotlin.LongArray))into this set. | Cmn | | `operator `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [plusAssign](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(androidx.collection.LongSet))`(elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)`)` Adds all the elements in the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(androidx.collection.LongSet))set into this set. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [remove](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#remove(kotlin.Long))`(element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`)` Removes the specified[element](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#remove(kotlin.Long))from the set. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [removeAll](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#removeAll(kotlin.LongArray))`(elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html)`)` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#removeAll(kotlin.LongArray))from the set, if present. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [removeAll](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#removeAll(androidx.collection.LongSet))`(elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)`)` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#removeAll(androidx.collection.LongSet))from the set, if present. | Cmn | | `@`[IntRange](https://developer.android.com/reference/kotlin/androidx/annotation/IntRange)`(from = 0) `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [trim](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#trim())`()` Trims this[MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet)'s storage so it is sized appropriately to hold the current elements. | Cmn | | ### Inherited functions | 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| From[androidx.collection.LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) |-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----| | `inline `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [all](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#all(kotlin.Function1))`(predicate: (element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`) `->` `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html)`)` Returns true if all elements match the given[predicate](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#all(kotlin.Function1)). | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [any](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#any())`()` Returns`true`if this set has at least one element. | Cmn | | `inline `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [any](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#any(kotlin.Function1))`(predicate: (element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`) `->` `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html)`)` Returns true if at least one element matches the given[predicate](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#any(kotlin.Function1)). | Cmn | | `operator `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [contains](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#contains(kotlin.Long))`(element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`)` Returns`true`if the specified[element](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#contains(kotlin.Long))is present in this set,`false`otherwise. | Cmn | | `@`[IntRange](https://developer.android.com/reference/kotlin/androidx/annotation/IntRange)`(from = 0) `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [count](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#count())`()` Returns the number of elements in this set. | Cmn | | `inline @`[IntRange](https://developer.android.com/reference/kotlin/androidx/annotation/IntRange)`(from = 0) `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [count](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#count(kotlin.Function1))`(predicate: (element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`) `->` `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html)`)` Returns the number of elements matching the given[predicate](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#count(kotlin.Function1)). | Cmn | | `open operator `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [equals](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#equals(kotlin.Any))`(other: `[Any](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-any/index.html)`?)` Compares the specified object[other](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#equals(kotlin.Any))with this set for equality. | Cmn | | `inline `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | [first](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#first())`()` Returns the first element in the collection. | Cmn | | `inline `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | [first](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#first(kotlin.Function1))`(predicate: (element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`) `->` `[Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html)`)` Returns the first element in the collection for which[predicate](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#first(kotlin.Function1))returns`true`. | Cmn | | `inline `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html) | [forEach](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#forEach(kotlin.Function1))`(block: (element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`) `->` `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html)`)` Iterates over every element stored in this set by invoking the specified[block](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#forEach(kotlin.Function1))lambda. | Cmn | | `open `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [hashCode](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#hashCode())`()` Returns the hash code value for this set. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [isEmpty](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#isEmpty())`()` Indicates whether this set is empty. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [isNotEmpty](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#isNotEmpty())`()` Returns`true`if this set is not empty. | Cmn | | [String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html) | [joinToString](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence))`(` ` separator: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` prefix: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` postfix: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` limit: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`,` ` truncated: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html) `)` Creates a String from the elements separated by[separator](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence))and using[prefix](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence))before and[postfix](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence))after, if supplied. | Cmn | | `inline `[String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html) | [joinToString](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence,kotlin.Function1))`(` ` separator: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` prefix: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` postfix: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` limit: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)`,` ` truncated: `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html)`,` ` crossinline transform: (`[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html)`) `->` `[CharSequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-char-sequence/index.html) `)` Creates a String from the elements separated by[separator](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence,kotlin.Function1))and using[prefix](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence,kotlin.Function1))before and[postfix](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#joinToString(kotlin.CharSequence,kotlin.CharSequence,kotlin.CharSequence,kotlin.Int,kotlin.CharSequence,kotlin.Function1))after, if supplied. | Cmn | | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | [none](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#none())`()` Returns`true`if this set has no elements. | Cmn | | `open `[String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html) | [toString](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#toString())`()` Returns a string representation of this set. | Cmn | | | ### Inherited properties | |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | From[androidx.collection.LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) |-----------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----| | [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [capacity](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#capacity()) Returns the number of elements that can be stored in this set without requiring internal storage reallocation. | Cmn | | [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html) | [size](https://developer.android.com/reference/kotlin/androidx/collection/LongSet#size()) Returns the number of elements in this set. | Cmn | | ## Public constructors ### MutableLongSet Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` MutableLongSet(initialCapacity: Int = DefaultScatterCapacity) ``` Creates a new[MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet) | Parameters | |---------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `initialCapacity: `[Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)` = DefaultScatterCapacity` | The initial desired capacity for this container. The container will honor this value by guaranteeing its internal structures can hold that many elements without requiring any allocations. The initial capacity can be set to 0. | ## Public functions ### add Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun add(element: Long): Boolean ``` Adds the specified element to the set. | Parameters | |------------------------------------------------------------------------------------------|--------------------------------| | `element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | The element to add to the set. | | Returns | |-------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | `true`if the element has been added or`false`if the element is already contained within the set. | ### addAll Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun addAll(elements: LongArray): Boolean ``` Adds all the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#addAll(kotlin.LongArray))into this set. | Parameters | |------------------------------------------------------------------------------------------------------|-----------------------------------------| | `elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html) | An array of elements to add to the set. | | Returns | |-------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | `true`if any of the specified elements were added to the collection,`false`if the collection was not modified. | ### addAll Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun addAll(elements: LongSet): Boolean ``` Adds all the elements in the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#addAll(androidx.collection.LongSet))set into this set. | Parameters | |---------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------| | `elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) | A[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)of elements to add to this set. | | Returns | |-------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | `true`if any of the specified elements were added to the collection,`false`if the collection was not modified. | ### clear Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun clear(): Unit ``` Removes all elements from this set. ### minusAssign Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` operator fun minusAssign(element: Long): Unit ``` Removes the specified[element](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(kotlin.Long))from the set if it is present. | Parameters | |------------------------------------------------------------------------------------------|-------------------------------------| | `element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | The element to remove from the set. | ### minusAssign Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` operator fun minusAssign(elements: LongArray): Unit ``` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(kotlin.LongArray))from the set, if present. | Parameters | |------------------------------------------------------------------------------------------------------|--------------------------------------------------| | `elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html) | An array of elements to be removed from the set. | ### minusAssign Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` operator fun minusAssign(elements: LongSet): Unit ``` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#minusAssign(androidx.collection.LongSet))from the set, if present. | Parameters | |---------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------| | `elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) | An[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)of elements to be removed from the set. | ### plusAssign Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` operator fun plusAssign(element: Long): Unit ``` Adds the specified element to the set. | Parameters | |------------------------------------------------------------------------------------------|--------------------------------| | `element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | The element to add to the set. | ### plusAssign Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` operator fun plusAssign(elements: LongArray): Unit ``` Adds all the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(kotlin.LongArray))into this set. | Parameters | |------------------------------------------------------------------------------------------------------|-----------------------------------------| | `elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html) | An array of elements to add to the set. | ### plusAssign Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` operator fun plusAssign(elements: LongSet): Unit ``` Adds all the elements in the[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#plusAssign(androidx.collection.LongSet))set into this set. | Parameters | |---------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------| | `elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) | A[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)of elements to add to this set. | ### remove Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun remove(element: Long): Boolean ``` Removes the specified[element](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#remove(kotlin.Long))from the set. | Parameters | |------------------------------------------------------------------------------------------|-------------------------------------| | `element: `[Long](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long/index.html) | The element to remove from the set. | | Returns | |-------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | `true`if the[element](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#remove(kotlin.Long))was present in the set, or`false`if it wasn't present before removal. | ### removeAll Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun removeAll(elements: LongArray): Boolean ``` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#removeAll(kotlin.LongArray))from the set, if present. | Parameters | |------------------------------------------------------------------------------------------------------|--------------------------------------------------| | `elements: `[LongArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-long-array/index.html) | An array of elements to be removed from the set. | | Returns | |-------------------------------------------------------------------------------------|-----------------------------------------------------------------------------| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | `true`if the set was changed or`false`if none of the elements were present. | ### removeAll Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun removeAll(elements: LongSet): Boolean ``` Removes the specified[elements](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet#removeAll(androidx.collection.LongSet))from the set, if present. | Parameters | |---------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------| | `elements: `[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet) | An[LongSet](https://developer.android.com/reference/kotlin/androidx/collection/LongSet)of elements to be removed from the set. | | Returns | |-------------------------------------------------------------------------------------|-----------------------------------------------------------------------------| | [Boolean](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-boolean/index.html) | `true`if the set was changed or`false`if none of the elements were present. | ### trim Cmn Added in[1.4.0](https://developer.android.com/jetpack/androidx/releases/collection#1.4.0) ``` fun trim(): @IntRange(from = 0) Int ``` Trims this[MutableLongSet](https://developer.android.com/reference/kotlin/androidx/collection/MutableLongSet)'s storage so it is sized appropriately to hold the current elements. Returns the number of empty elements removed from this set's storage. Returns 0 if no trimming is necessary or possible.