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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
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