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Most Frequent Element in an Array
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mostFrequentElement.md

Create a function that takes an array and returns a new array containing the most frequently occuring elements in it.

function mostFrequentElement(arr){
// write your code here
}
console.log(mostFrequentElement([1,2,5,1,3,5,2,1])); // [1]
console.log(mostFrequentElement([1,2,5,1,3,5,2,1,2])); // [1,2]
console.log(mostFrequentElement([1,2,5,1,3,5,2,1,2,3,3])); // [1,2,3]

Please watch this video for a hint for the problem:

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