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:
Ds\Map 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
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