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
