Compute the set difference using JavaScript arrays

Given a two array and the task is to compute the set difference between the two Arrays using JavaScript.

Approach:

  • Store the both array values into the two variables.
  • Use filter() method for every value of array_1, if there is a value in array_2 then not include it. Otherwise include the value of array_1.

Example 1: In this example, the set difference is calculated using the filter() method.



filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE HTML> 
<html
  
<head
    <title
        Compute the set difference using
        Javascript arrays
    </title>
</head>
  
<body style = "text-align:center;"
      
    <h1 style = "color:green;" id = "h1"
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style
        "color:green; font-size: 20px; font-weight: bold;">
    </p>
      
    <script
        var up = document.getElementById('GFG_UP');
        var down = document.getElementById('GFG_DOWN');
        var A = [7, 2, 6, 4, 5];
        var B = [1, 6, 4, 9];
        up.innerHTML = "Click on the button to compute "
                + "the set difference.<br>" + "Array1 - ["
                + A + "]<br>Array2 - [" + B + "]";
          
        function GFG_Fun() {
            diff = A.filter(x => !B.includes(x) )
            down.innerHTML = "Set-Difference = " + diff;
        }
    </script
</body
  
</html>    

chevron_right


Output:

  • Before clicking on the button:
  • After clicking on the button:

Example 2: In this example, the set difference is calculated using the filter() method but by a bit different approach.

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE HTML> 
<html
  
<head
    <title
        Compute the set difference
        using Javascript arrays
    </title>
</head>
  
<body style = "text-align:center;"
      
    <h1 style = "color:green;" id = "h1"
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style
        "font-size: 15px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style =
        "color:green; font-size: 20px; font-weight: bold;">
    </p>
      
    <script
        var up = document.getElementById('GFG_UP');
        var down = document.getElementById('GFG_DOWN');
        var A = ["GFG", "GeeksForGeeks", "a", "b"];
        var B = ["gfg", "a", "b"];
          
        up.innerHTML = "Click on the button to compute"
                + " the set difference.<br>" + "Array1 - ["
                + A + "]<br>Array2 - [" + B + "]";
          
        function GFG_Fun() {
            diff = A.filter(function(x) {
                return B.indexOf(x) < 0 
            })
              
            down.innerHTML = "Set-Difference = " + diff;
        }
    </script> 
</body
  
</html>                    

chevron_right


Output:

  • Before clicking on the button:
  • After clicking on the button:


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.