Nodejs Utililty Methods Array Count

Array.prototype.count = function(){
    return this.length;
};

Array.prototype.count = function () {
    return this.length;
let numbers = [1,2,3,4];
let moreNumbers = new Array(1,2,3,4);
console.log(numbers.count());
console.log(moreNumbers.count());

Array.prototype.count = function () {
    var temp = {};
    for (var i = 0; i < this.length; i++) {
        if (!(temp[this[i]])) {
            temp[this[i]] = 1;
        } else {
            temp[this[i]]++;
    return temp;

function letterCapitalize(string) {
    var stringArray = string.split(" ");
    var sentence = stringArray.map(function(word) {
        var firstLetter = word[0];
        var otherLetters = word.slice(1);
        var capFirst = firstLetter.toUpperCase();
        return capFirst + otherLetters;
    })
    return sentence.join(" ");
...

Array.prototype.count = function(filter)
  var ct = 0;
  for (var i = 0; i< this.length; i++) {
    if(filter(this[i])){
      ct++;
  return ct;
...

Array.prototype.count = function(n) {
  var count = 0;
  for (var i = 0; i < this.length; i++) {
    if (this[i] == n) count++;
  return count;
function primeFactors(n) {
  var f = [];
...

Array.prototype.count = function (value) {
  var count = 0, i;
  for (i = 0; i < this.length; ++i) {
    if (this[i] === value) {
      ++count;
  return count;
};
...

Array.prototype.count = function (value) {
  var count = 0, i;
  for (i = 0; i < this.length; ++i) {
    if (this[i] === value) {
      ++count;
  return count;
};
...

Array.prototype.countCattle = function ( kind ){
  var numKind = 0;
  for(var i = 0; i<this.length; i++){
    if(this[i].type == kind){
      numKind++;
  return numKind;
};
...

Array.prototype.countCattle = function(cattle){
  var number = 0;
  for(var i = 0; i < this.length; i ++){
    if(this[i].type == cattle){
      number ++ ;
  return number;
};
...