PHP | Ds\Map diff() Function
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 )); ?> |
Output:
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 )); ?> |
Output:
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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