HashSet

HashSet

HashSet representation

Constructor

new HashSet(initialCapacityopt)

Implements:
Example
const set = new Collections.HashSet();
Parameters:
Name Type Attributes Default Description
initialCapacity number <optional>
 13 The initial size of the hashset

Methods

add(element) → {Set}

Implements:
Adds an element to the set if already in set
Example
set.add(1);
set.add(2);
set.add(1);
// set contains [1, 2] order might not be guareenteed
Parameters:
Name Type Description
element * The element to add to the set
Returns:
The instance that this method was called
Type
Set

cardinality()

Implements:
Returns the number of elements in the set
Example
set.add(1);
set.add(2);
set.cardinality() ; // 2

diff(thatSet) → {Array}

Implements:
Returns the set difference (not symmetric) of 'this' set and another set x such that x is in A and x is not in B, where A and B are two sets
Example
set.add(1);
set.add(2);
set2 = new <Another Set>
set2.add(2);
set.diff(set2); // [1]
Parameters:
Name Type Description
thatSet Set another set instance
Returns:
The difference of this and @param thatSet
Type
Array

entries() → {Array}

Implements:
Returns all elements in the set
Returns:
Array with all elements in the set
Type
Array

has(element) → {boolean}

Implements:
Reports whether the set contains a given value
Example
set.add(1);
set.add(2);
set.has(3); // false
Parameters:
Name Type Description
element * The element to find
Returns:
True if set contains @param element and false otherwise
Type
boolean

intersect(thatSet, thatSet) → {Array}

Implements:
Returns the mathematical set intersection of 'this' set and another set
Example
set.add(1);
set.add(2);
set2 = new Collections.HashSet();
set2.add(2);
set.intersect(set2); // [2]
Parameters:
Name Type Description
thatSet Set another Set instance
thatSet
Returns:
The array containing the set intersection of this and
Type
Array

remove() → {Set}

Implements:
Removes an element from the set
Returns:
the instance that this method was called
Type
Set

union(thatSet) → {Array}

Implements:
Returns the mathematical set union of 'this' set and another set
Example
set.add(1);
set.add(2);
set2 = new <Another Set>
set2.add(2);
set.union(set2); // [1, 2]
Parameters:
Name Type Description
thatSet Set another set instance
Returns:
An array containing the union of this and @param thatSet
Type
Array