Deque
A simple double-linked queue abstraction, backed by linked list.
Deque type
queue<Type>
Subtypes | Supertypes | Comparable types |
|---|---|---|
| sequence<Type> queue<Type> stack<Type> | java.util.Deque<Type> |
Deque creation
new linkedlist
Parameter type | Result type |
|---|---|
Type... sequence<? extends Type> | deque<Type> |
Creates an empty deque. Optionally, initial values may be specified right in the new linked list creation expression.
deque<string> test = new linkedlist<string> {"A", "B", "C"};
Alternatively, a sequence may be specified that is used to copy elements from.
deque<Type> = new linkedlist<Type> (sequence);
Operations on deque
iterator
Operand type | Parameter type | Result type |
|---|---|---|
sequence<Type> | none | modifying_iterator<Type> |
This operation is redefined for deque to return a modifying_iterator.
addFirst / push
Operand type | Parameter type | Result type |
|---|---|---|
deque<Type> | Type | Type |
Appends an element to the head of the deque.
set.addFirst (value);
addLast
Operand type | Parameter type | Result type |
|---|---|---|
deque<Type> | Type | Type |
Appends an element to the tail of the deque.
set.addLast (value);
removeFirst / pop
Operand type | Parameter type | Result type |
|---|---|---|
deque<Type> |
| Type |
Removes an element from the head of the deque.
set.removeFirst (value);
first
Operand type | Parameter type | Result type |
|---|---|---|
queue<Type> |
| Type |
Retrieves the first element at the head of the deque without removing it.
set.first ();
last
Operand type | Parameter type | Result type |
|---|---|---|
queue<Type> |
| Type |
Retrieves the first element at the tail of the deque without removing it.
set.first ();