PHP | Ds\Map remove() Function
The Ds\Map::remove() function is an inbuilt function in PHP which is used to remove and return a value by key.
Syntax:
mixed Ds\Map::remove( $key, $default )
Parameters: This function accepts two parameters as mentioned above and described below:
- $key: It holds the key value which need to remove.
- $default: It is optional parameter and it returns if key not found.
Return Value: This function returns the value that was removed.
Exception: This function throws OutOfRangeException if the key not exist and value of $default is not provided.
Below programs illustrate the Ds\Map::remove() function in PHP:
Example 1:
<?php // Declare new Map $map = new \Ds\Map([ 1 => "geeks", 2 => "for", 3 => "geeks", 4 => "DataStructures"]); echo("Map Elements\n"); // Display the map elements print_r($map); echo("\nRemoved element of the map: \n"); // Use remove() function to remove // value at index 3 and return it var_dump($map->remove(3)); ?> |
Output:
Map Elements
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => 1
[value] => geeks
)
[1] => Ds\Pair Object
(
[key] => 2
[value] => for
)
[2] => Ds\Pair Object
(
[key] => 3
[value] => geeks
)
[3] => Ds\Pair Object
(
[key] => 4
[value] => DataStructures
)
)
Removed element of the map:
string(5) "geeks"
Example:
<?php // Declare new Map $map = new \Ds\Map([ "a" => "geeks", "b" => "for", "c" => "geeks", "d" => "DataStructures"]); echo("Map Elements\n"); // Display the map elements print_r($map); echo("\nRemoved element of the map: \n"); // Use remove() function to remove // value at index 3 and return it var_dump($map->remove("c")); ?> |
Output:
Map Elements
Ds\Map Object
(
[0] => Ds\Pair Object
(
[key] => a
[value] => geeks
)
[1] => Ds\Pair Object
(
[key] => b
[value] => for
)
[2] => Ds\Pair Object
(
[key] => c
[value] => geeks
)
[3] => Ds\Pair Object
(
[key] => d
[value] => DataStructures
)
)
Removed element of the map:
string(5) "geeks"
