PHP | Ds\skip() 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 
  
// 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 
  
// 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 | Ds\skip() Function

B

barykrg

Improve

Article Tags :

Similar Reads

PHP | Ds\Deque 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 | Ds\Deque 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 | Ds\Deque 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 | Ds\Deque 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 | Ds\Deque join() Function

The Ds\Deque::join() function is an inbuilt function in PHP which is used to join all values in the Deque as a string. The separator can also be used to join the elements. Syntax: public Ds\Deque::join( $glue ) : string Parameters: This function accepts single parameter $glue which holds the separat

PHP | Ds\Map isEmpty() Function

The Ds\Map::isEmpty() function in PHP is used to check whether a given Map is empty or not. A Map is empty to be empty if does not contain any key-value pair. Syntax: Ds\Map public Ds\Map::isEmpty ( void ) Parameter: It does not accepts any parameter. Return value: This function returns a boolean va

PHP Ds\Set 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 | Ds\Deque merge() Function

The Ds\Deque::merge() function is an inbuilt function in PHP which is used to return the merged Deque after merging all the elements of one Deque with another by adding all the values into a copy and returns that copy. Syntax: public Ds\Deque::merge( $values ) : Ds\Deque Parameters: This function ac

PHP | Ds\Deque pop() Function

The Ds\Deque::pop() function is an inbuilt function in PHP which is used to remove the last element from Deque (if Deque is not empty) and return it. If Deque is empty then it throws an exception. Syntax: public Ds\Deque::pop( void ) : mixed Parameters: This function does not accept any parameter. R

PHP | Ds\Deque push() Function

The Ds\Deque::push() function is an inbuilt function in PHP which is used to add the elements to the Deque by appending an element at the end of the Deque. Syntax: public Ds\Deque::push( $values ) : void Parameters: This function accepts single parameter $values which holds the elements to be added