How to calculate the XOR of array elements using JavaScript ? - GeeksforGeeks

15 Apr, 2020
Given an array and is the task to find the XOR of Array elements using JavaScript. There are two approaches to solve this problem which are discussed below:
Simple method: It uses a simple method to access the array elements by an index number and use the loop to find the XOR of values of an Array using JavaScript.
Example: This example uses a simple method to find the XOR of Array elements using JavaScript.
<!DOCTYPE html> <html>   <head>     <title>         How to Find the XOR of Values         of an Array in JavaScript?     </title> </head>   <body style="text-align:center;">           <h1 style = "color:green;" >         GeeksForGeeks     </h1>           <h3>         How to Find the XOR of Values         of an Array in JavaScript?     </h3>           <h4>         ----Given Array----<br>         [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]     </h4>           <button onclick="myGeeks()">Click</button>           <p id="gfg"></p>           <script>         function XOR(input)        {             if (toString.call(input) !== "[object Array]")             return false;                       var total = Number(input[0]);             for(var i=1;i<input.length;i++) {                                 if(isNaN(input[i])){                     continue;                 }                               total ^= Number(input[i]);             }             return total;         }         function myGeeks(item) {                 document.getElementById("gfg").innerHTML                    = "----XOR of Array----" + "<br>"                     + XOR([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);             }    </script> </body>   </html>                    
Output:
Before click on the Button:
After click on the Button:
Using reduce() method: The array reduce() method in JavaScript is used to reduce the array to a single value and executes a provided function for each value of the array (from left-to-right) and the return value of the function is stored in an accumulator.
Syntax:
array.reduce( function( total, currentValue, currentIndex, arr ), initialValue )
Example: This example uses array reduce() method to find the XOR of values of an Array using JavaScript.
<!DOCTYPE html> <html>   <head>     <title>         How to Find the XOR of Values         of an Array in JavaScript?     </title> </head>   <body style="text-align:center;">           <h1 style = "color:green;" >         GeeksForGeeks     </h1>           <h3>         How to Find the XOR of Values         of an Array in JavaScript?     </h3>           <h4>         ----Given Array----<br>         [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]     </h4>           <button onclick="myGeeks()">         Click Here!     </button>           <br><br>           XOR: <span id="GFG"></span>           <script>         var arr=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10];                   function ORofArray(XOR, num) {             return XOR ^ num;         }         function myGeeks(item) {             document.getElementById("GFG").innerHTML                 = arr.reduce(ORofArray);         }     </script> </body>   </html>                    
Output:
Before click on the Button:
After click on the Button:
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