Number Of Occurrences

[RazvanBugoi]

https://www.codewars.com/kata/52829c5fe08baf7edc00122b/train/javascript

[RazvanBugoi]

Array.prototype.numberOfOccurrences = function(arr,num) {
  let output = [];
  for (let i=0; i<=arr.length; i++) {
    if(arr[i] == num) output.push(arr[i]);
  }
    return output.length;
}

[RazvanBugoi]

Array.prototype.numberOfOccurrences = function(num) {
  return this.filter((element) => element == num).length;
}