GenericSet - Collections for JavaScript

An abstract collection that implements many generic methods, reusable by most sets.

union(values): Returns the set of values including all values from both of these sets.
intersection(values): Returns the set of values that are in both of these sets.
difference(values): Returns the set of values that are in this set, excluding the values that are also in the other set.
symmetricDifference(values): Returns the set of values that are only in one of these sets.
remove(value): An alias for delete(value) on sets that increases the overlap with the W3C DOMTokenList interface, implemented by classList.
contains(value): An alias for has(value) on sets that increases the overlap with the W3C DOMTokenList interface, implemented by classList.
toggle(value): Toggles the existence of a value in a set.
deleteAll(value, equals?): Deletes every value equivalent to the given value from the collection.
toJSON(): Used by JSON.stringify to create a JSON representation of the collection.
equals(value, equals?): Returns whether this collection is equivalent to the given collection.

require("collections/shim-object");
var GenericSet = require("collections/generic-set");
Object.addEach(MySet.prototype, GenericSet.prototype);

Source code