The Ds\Collection::isEmpty() function is an inbuilt function in PHP which is used to returns whether collection is empty.
Syntax:
Ds\Collection::isEmpty ( void ) : bool
Parameters: This function does not accepts any parameters.
Return Value: It returns True if collection is empty or False otherwise.
Below programs illustrate the Ds\Collection::isEmpty() function in PHP:
Example 1:
<?php // Create a collection $collection = new \Ds\Vector([10, 15, 21, 13, 16, 18]); // Use isEmpty function $res = $collection->isEmpty(); // Display the result var_dump($res); // Create a collection $collection = new \Ds\Vector(); // Use isEmpty function $res = $collection->isEmpty(); // Display the result var_dump($res); ?> |
Output:
bool(false) bool(true)
Example 2:
<?php // Create a collection $collection = new \Ds\Vector(); // display output var_dump($collection->isEmpty()); // Create a collection $collection = new \Ds\Vector([1, 3, 5, 2, 6]); // Display output var_dump($collection->isEmpty()); ?> |
Output:
bool(true) bool(false)
Reference: http://php.net/manual/en/ds-collection.isempty.php
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