The Ds\Map::diff() function is an inbuilt function in PHP which is used to create a map using the key which contains the elements of the first map which are not present in another map. Syntax:
public Ds\Map::diff( $map )
Parameters: This function accepts a single parameter $map which is used to hold the map elements whose value need to be excluded. Return value: It returns a new map containing the elements of the first map which are not present in another map. Below programs illustrate the Ds\Map::diff() function in PHP: Program 1:
<?php // PHP program to illustrate the diff() // function of Ds\map // Creating a Map $map1 = new \Ds\Map(["1" => "10",
"3" => 30, "4" => 40]);
// Creating another Map $map2 = new \Ds\Map(["2" => "20",
"3" => 35, "5" => 50, "6" => 60]);
echo "Difference between two map: <br>";
print_r( $map1 -> diff( $map2 ));
?> |
Difference between two map: Ds\Map Object ( [0] => Ds\Pair Object ( [key] => 1 [value] => 10 ) [1] => Ds\Pair Object ( [key] => 4 [value] => 40 ) )
Program 2:
<?php // PHP program to illustrate the diff() // function of Ds\map // Creating a Map $map1 = new \Ds\Map([
"1" => "Geeks",
"2" => " for ",
"3" => "Geeks"]);
// Creating another Map $map2 = new \Ds\Map([
"2" => " for ",
"3" => "Geeks",
"4" => "GeeksforGeeks"]);
echo "Difference between two map: <br>";
print_r( $map1 -> diff( $map2 ));
?> |
Difference between two map: Ds\Map Object ( [0] => Ds\Pair Object ( [key] => 1 [value] => Geeks ) )
Reference: https://www.php.net/manual/en/ds-map.diff.php