Find Most Frequent Element in Array using JavaScript | Learn JavaScript & Algorithms

Find most frequent element in array using javascript. Write a function that finds the most frequent element in an array using JavaScript. Here's a simple approach that finds the most frequent element in an array in JavaScript. Define a function which takes an array as an argument. I will initialize an empty object 'frequencyMap' to store the frequency of each element in the array.

I will initialize two more variables 'maxElement' to the first element of the array and maxCount to 1. I will start a for loop to iterate through each element in the array. For each iteration, I will store the current element in a variable 'element'.

Check if element is already a property in the frequencyMap object. If it is, increment the value of that property by 1. If it is not, add the property element with a value of 1 to the frequencyMap object.

Check if the value of element in frequencyMap is greater than maxCount. If it is, update maxElement to be element and maxCount to be the value of element in frequencyMap. After the for loop finishes, return maxElement as the result.

Call mostFrequent function with arr as the argument. It will return the most frequent element in the array. And this is how we can find the most frequent element in an array using JavaScript.

It can be a good javascript interview question or frontend interview question. You may not be required to solve it on paper or whiteboard but the interviewer may ask you to give an idea on how to approach this algorithm. If you have an understanding of how to solve this problem or approach this algorithm, you will be able to answer it and get your next job as a frontend developer or full-stack developer.

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[freehuman]

the one who coded this is smart, i struggled with it for two days, i really forgot to use an empty object.