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/Kotlin

HashSet

typealias HashSet<E> = HashSet<E>

Platform and version requirements: Kotlin 1.1, JVM

open class HashSet<E> : AbstractMutableSet<E>

Platform and version requirements: JS

The implementation of the MutableSet interface, backed by a HashMap instance.

HashSet()

HashSet(initialCapacity: Int, loadFactor: Float = 0.0f)

Constructs a new empty HashSet.

HashSet(elements: Collection<E>)

Constructs a new HashSet filled with the elements of the specified collection.

size	open val size: Int Returns the size of the collection.

add	open fun add(element: E): Boolean Adds the specified element to the collection.
clear	open fun clear() Removes all elements from this collection.
contains	open operator fun contains(element: E): Boolean Checks if the specified element is contained in this collection.
isEmpty	open fun isEmpty(): Boolean Returns `true` if the collection is empty (contains no elements), `false` otherwise.
iterator	open fun iterator(): MutableIterator<E> Returns an iterator over the elements of this object.
remove	open fun remove(element: E): Boolean Removes a single instance of the specified element from this collection, if it is present.

open fun equals(other: Any?): Boolean

Compares this set with another set instance with the unordered structural equality.

open fun hashCode(): Int

Returns the hash code value for this set.