CeylonList(JList<out Element> list)
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.

In general, hash values vary between platforms and between executions of the same program.

Note that when executing on a Java Virtual Machine, the 64-bit Integer value returned by an implementation of hash is truncated to a 32-bit integer value by removal of the 32 highest order bits, before returning the value to the caller.

Refines List.hash ultimately refines Object.hash
lastIndexSource Codeshared actual Integer? lastIndex

The index of the last element of the list, or null if the list is empty. Always size>0 then size-1.

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: Correspondence<Key,Item>
Attributes inherited from: Iterable<Element,Absent>
Attributes inherited from: List<Element>
cloneSource Codeshared actual default List<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
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.

Note that an implementation of equals() that always returns false does satisfy the constraints given above. Therefore, in very rare cases where there is no reasonable definition of value equality for a class, for example, function references (Callable), it is acceptable for equals() to be defined to return false for every argument.

Refines List.equals ultimately refines Object.equals
getFromFirstSource Codeshared actual Element? getFromFirst(Integer index)

The indexth element returned by an iterator of this stream, or null if there are fewer than index+1 elements in the stream. For a stream with an unstable iteration order, a different value might be produced each time getFromFirst(index) is called for a given integer index.

Refines List.getFromFirst ultimately refines Iterable.getFromFirst
iteratorSource Codeshared actual Iterator<Element> iterator()

An iterator for the elements belonging to this stream.

Refines CeylonCollection.iterator ultimately refines Iterable.iterator
Inherited Methods
Methods inherited from: CeylonCollection<Element>
Methods inherited from: Object
Methods inherited from: Category<Element>
Methods inherited from: Collection<Element>
Methods inherited from: Correspondence<Key,Item>
Methods inherited from: Iterable<Element,Absent>
Methods inherited from: List<Element>
Methods inherited from: Ranged<Index,Element,Subrange>