CeylonSet(JSet<out Element> set)
hashSource Codeshared actual Integer hash

The hash value of the value, which allows the value to be an element of a hash-based set or key of a hash-based map. Implementations must respect the constraint that:

  • if x==y then x.hash==y.hash.

Therefore, a class which refines equals must also refine hash.

Because the Integer type is platform-dependent a compiler for a given platform is permitted to further manipulate the calculated hash for an object, and the resulting hash may differ between platforms.

Refines Set.hash ultimately refines Object.hash
sizeSource Codeshared actual Integer size

The number of elements returned by the iterator of this stream, if the iterator terminates. In the case of an infinite stream, this operation never terminates.

Refines CeylonCollection.size ultimately refines Iterable.size
Inherited Attributes
Attributes inherited from: CeylonCollection<Element>
Attributes inherited from: Object
Attributes inherited from: Collection<Element>
Attributes inherited from: Iterable<Element,Absent>
Attributes inherited from: Set<Element>
cloneSource Codeshared actual default Set<Element> clone()

A shallow copy of this collection, that is, a collection with identical elements which does not change if this collection changes. If this collection is immutable, it is acceptable to return a reference to this collection. If this collection is mutable, a newly instantiated collection must be returned.

Refines CeylonCollection.clone ultimately refines Collection.clone
complementSource Codeshared actual Set<Element> complement<Other>(Set<Other> set)
given Other satisfies Object

Returns a new Set containing all the elements in this set that are not contained in the given Set.

containsSource Codeshared actual Boolean contains(Object element)

Returns true if the given value belongs to this Category, that is, if it is an element of this Category, or false otherwise.

For most Categorys the following relationship is satisfied by every pair of elements x and y:

  • if x==y, then x in category == y in category

However, it is possible to form a useful Category consistent with some other equivalence relation, for example ===. Therefore implementations of contains() which do not satisfy this relationship are tolerated.

Refines CeylonCollection.contains ultimately refines Category.contains
equalsSource Codeshared actual Boolean equals(Object that)

Determine if two values are equal. Implementations should respect the constraints that:

  • if x===y then x==y (reflexivity),
  • if x==y then y==x (symmetry),
  • if x==y and y==z then x==z (transitivity).

Furthermore it is recommended that implementations ensure that if x==y then x and y have the same concrete class.

A class which explicitly refines equals() is said to support value equality, and the equality operator == is considered much more meaningful for such classes than for a class which simply inherits the default implementation of identity equality from Identifiable.

Refines Set.equals ultimately refines Object.equals
exclusiveUnionSource Codeshared actual Set<Element|Other> exclusiveUnion<Other>(Set<Other> set)
given Other satisfies Object

Returns a new Set containing only the elements contained in either this set or the given Set, but no element contained in both sets.

intersectionSource Codeshared actual Set<Element&Other> intersection<Other>(Set<Other> set)
given Other satisfies Object

Returns a new Set containing only the elements that are present in both this set and the given Set and that are instances of the intersection Element&Other of the element types of the two sets.

Note that, according to this definition, and even though 1==1.0 evaluates to true (Integer.equals), the expression

set { 1 } & set { 1.0 }

produces the empty set {}.

iteratorSource Codeshared actual Iterator<Element> iterator()

An iterator for the elements belonging to this stream.

Refines CeylonCollection.iterator ultimately refines Iterable.iterator
unionSource Codeshared actual Set<Element|Other> union<Other>(Set<Other> set)
given Other satisfies Object

Returns a new Set containing all the elements of this set and all the elements of the given Set.

Note that it is possible for two sets of disjoint element type to be considered to have elements in common. For example, since 1==1.0 evaluates to true (Integer.equals), the expression

set { 1 } | set { 1.0 }

produces the set { 1 }.

Refines Set.union
Inherited Methods
Methods inherited from: CeylonCollection<Element>
Methods inherited from: Object
Methods inherited from: Category<Element>
Methods inherited from: Collection<Element>
Methods inherited from: Iterable<Element,Absent>
Methods inherited from: Set<Element>