Syntax:public DsDeque::isEmpty (void): bool
Parameters: this function takes no parameters.
Return value:this function returns true if Deque is empty, otherwise it returns false.The following programs illustrate the function
Ds / Deque::isEmpty()in PHP:
Program 1:
// Declare deque
$deck
=
new
DsDeque ([1, 2, 3, 4, 5, 6]);
echo
(
" Original Deque "
);
// Show Deque elements
print_r (
$deck
);
// Use the isEmpty() function to check
// empty or not
var_dump (
$deck
-> isEmpty());
?>
Exit:Original Deque DsDeque Object ([0] = > 1 [1] = > 2 [2] = > 3 [3] = > 4 [4] = > 5 [5] = > 6) bool (false)
Program 2:
// Declare deque
$deck
=
new
DsDeque ([1, 2, 3, 4, 5, 6]);
echo
(
" Original Deque "
);
// Show Deque elements
print_r (
$deck
);
// Clear Deque
$deck
-> clear();
// Use the isEmpty() function to check
// empty or not
var_dump (
$deck
-> isEmpty());
?>
Exit:Original Deque DsDeque Object ([0] = > 1 [1] = > 2 [2] = > 3 [3] = > 4 [4] = > 5 [5] = > 6) bool (true)
Link: http://php.net/manual/en /ds-deque.isempty.php