How to know if two arrays have the same values in JavaScript?

Let’s say the following are our arrays −

var firstArray=[100,200,400]; var secondArray=[400,100,200];

You can sort both the arrays using the sort() method and use for loop to compare each value as in the below code −

Example

var firstArray=[100,200,400]; var secondArray=[400,100,200]; function areBothArraysEqual(firstArray, secondArray) {    if (!Array.isArray(firstArray) || ! Array.isArray(secondArray) ||    firstArray.length !== secondArray.length)    return false;    var tempFirstArray = firstArray.concat().sort();    var tempSecondArray = secondArray.concat().sort();    for (var i = 0; i < tempFirstArray.length; i++) {       if (tempFirstArray[i] !== tempSecondArray[i])          return false;    }    return true; } if(areBothArraysEqual(firstArray,secondArray)) console.log("Both are equals"); else console.log("Both are not equals");

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo156.js.

Output

PS C:\Users\Amit\JavaScript-code> node demo156.js Both are equals