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:

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<?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));
  
?> 

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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:

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<?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));
  
?> 

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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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