PHP | Ds\Vector 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.

Below programs illustrate the Ds\Vector::isEmpty() function in PHP:

Program 1:

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<?php
  
// Create new vector
$vector = new \Ds\Vector([1, 2, 4, 5]);
  
// Use isEmpty() function to
// check vector
var_dump($vector->isEmpty());
  
// Use clear() function to remove
// vector elements
$vector->clear();
  
// Use isEmpty() function
var_dump($vector->isEmpty());
  
?>

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Output:

bool(false)
bool(true)

Program 2:

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<?php
  
// Create new vector
$vector = new \Ds\Vector(["geeks", "for", "geeks"]);
  
// Use isEmpty() function to
// check vector
var_dump($vector->isEmpty());
  
// Use clear() function to remove
// vector elements
$vector->clear();
  
// Use isEmpty() function
var_dump($vector->isEmpty());
  
?>

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Output:

bool(false)
bool(true)

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



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