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:
<?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());
?> |
Output:
bool(false) bool(true)
Program 2:
<?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());
?> |
Output:
bool(false) bool(true)
Reference: http://php.net/manual/en/ds-vector.isempty.php