Get the Difference between Two Sets using JavaScript
Given two arrays and the task is to compute the set difference between the two Arrays using JavaScript.
Approach:
- Store both array values in the two variables.
- Use the filter() method for every value of array_1, if there is a value in array_2 then do not include it. Otherwise include the value of array_1.
Example 1: In this example, the set difference is calculated using the filter() method.
html
<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> |
Output:
Example 2: In this example, the set difference is calculated using the filter() method but by a bit different approach.
html
<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> |
Output:
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