PHP DsQueue isEmpty() Function

PHP | Ds\Deque isEmpty() Function

Last Updated : 14 Aug, 2019

The Ds\Deque::isEmpty() function is an inbuilt function in PHP which is used to check the Deque is empty or not. Syntax:

public Ds\Deque::isEmpty( void ) : bool

Parameters: This function does not accept any parameter. Return Value: This function returns true if the Deque is empty, else return false. Below programs illustrate the Ds\Deque::isEmpty() function in PHP: Program 1:

PHP

<?php

// Declare a deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);

echo("Original Deque\n");

// Display the Deque elements
print_r($deck);

// Use isEmpty() function to check
// the deque is empty or not
var_dump($deck->isEmpty());

?>

Output:

Original Deque
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)
bool(false)

Program 2:

PHP

<?php

// Declare a deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);

echo("Original Deque\n");

// Display the Deque elements
print_r($deck);

// Clearing the Deque
$deck->clear();

// Use isEmpty() function to check
// the deque is empty or not
var_dump($deck->isEmpty());

?>

Output:

Original Deque
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)
bool(true)

Reference: http://php.net/manual/en/ds-deque.isempty.php

PHP DsQueue isEmpty() Function

B

barykrg

Improve

Article Tags :

Similar Reads

PHP | DsDeque isEmpty() Function

The Ds\Deque::isEmpty() function is an inbuilt function in PHP which is used to check the Deque is empty or not. Syntax: public Ds\Deque::isEmpty( void ) : bool Parameters: This function does not accept any parameter. Return Value: This function returns true if the Deque is empty, else return false.

PHP DsQueue isEmpty() Function

The Ds\Queue::isEmpty() Function in PHP is used to whether a particular Queue instance is empty or not. It returns True if the Queue is empty otherwise it returns False. Syntax: bool public Ds\Queue::isEmpty ( void ) Parameters: This function does not accepts any parameters. Return Value: This funct

PHP DsSet isEmpty() Function

The Ds\Set::isEmpty() function of Ds\Set class in PHP is an inbuilt function which is used to check whether a set is empty or not. If the Set instance is empty then this function returns true otherwise it returns False. Syntax: bool public Ds\Set::isEmpty ( void ) Parameters: This function does not

PHP | DsDeque insert() Function

The Ds\Deque::insert() function is an inbuilt function in PHP which is used to insert the value at the given index in the Deque. Syntax: public Ds\Deque::insert( $index, $values ) : void Parameters: This function accepts two parameter as mentioned above and described below: $index: This parameter ho

PHP | DsStack isEmpty() Function

The Ds\Stack::isEmpty() function of PHP Ds\Stack class is used to check whether a Stack is empty or not. This method returns a boolean value, True if the Stack is empty otherwise it returns False. Syntax: bool public Ds\Stack::isEmpty ( void ) Parameter: This function does not accept any parameters.

PHP | DsVector isEmpty() Function

The Ds\Vector::isEmpty() function is an inbuilt function in PHP which is used to check the vector is empty or not. Syntax: bool public Ds\Vector::isEmpty( void ) Parameters: This function does not accept any parameter. Return Value: This function returns true if the vector is empty, false otherwise.

PHP | DsDeque get() Function

The Ds\Deque::get() function is an inbuilt function in PHP which is used to return the value at the given index. Syntax: public Ds\Deque::get( $index ) : mixed Parameters: This function accepts single parameter $index which holds the index for which element is to be found. Return Value: This functio

PHP | DsDeque map() Function

The Ds\Deque::map() function is an inbuilt function in PHP which is used to return the Deque with each element modified on the basis of operation performed as per the callback function. Syntax: public Ds\Deque::map( $callback ) : Ds\Deque Parameters: This function accepts single parameter $callback

PHP | DsDeque last() Function

The Ds\Deque::last() function is an inbuilt function in PHP which is used to return the last element of Deque if Deque is not empty. Syntax: public Ds\Deque::last( void ) : mixed Parameters: This function does not accept any parameter. Return Value: This function returns the last element in the dequ

PHP | DsSequence insert() Function

The Ds\Sequence::insert() function is an inbuilt function in PHP which is used to insert value in the sequence at the given index. Syntax: void abstract public Ds\Sequence::insert ( int $index [, mixed $...values ] ) Parameter: This function accepts two parameter as mentioned above and described bel