Nodejs Utililty Methods Array to Twenty Convert

Array.prototype.toTwenty = function() {
  var newArray = [];
  for (var i = 1; i <= 20; i++) {
    newArray.push(i);
  return newArray;
Array.prototype.toForty = function() {
  var newArray = [];
...

Array.prototype.toTwenty = function(){
  for(var loop =1; loop<=20;loop++){
    this.push(loop);
  return this;
};
Array.prototype.toForty = function(){
  for(var loop = 1;loop<=20;loop++){
    this.push(loop*2);
...

const binarySearch = function binarySearch (){
Array.prototype.toTwenty = function () {
 for (var i = 1; i <= 20; i++){
   this.push(i);
 return this;
};
Array.prototype.toForty = function () {
 for (var i = 2; i <= 40; i+=2){
...

Array.prototype.toTwenty = function(){
 var answer=[];
   for (var i=1; i<=20; i++){
     answer.push(i)
   return answer;
Array.prototype.toForty = function(){
  var answer=[];
...

Array.prototype.toTwenty = function(){
  var array = new Array();
  for(var i = 1; i <= 20; i++){
    array.push(i);
  return array;
};
Array.prototype.toForty = function(){
  var array = new Array();
...

var oneToTwenty = [].toTwenty();
var twoToForty = [].toForty();
var tenToOneThousand = [].toOneThousand();
Array.prototype.toTwenty = function(){
    var start = 1;
    var end = 20;
    for(var i = start; i <= end; i += 1){
        result.push(i);
   return result;
Array.prototype.toForty = function(){
    var start = 2;
    var end = 40;
    for(var i = start; i <= end; i += 2){
        result.push(i);
   return result;
Array.prototype.toOneThousand = function(){
    var start = 10;
    var end = 1000;
    for(var i = start; i <= end; i += 10){
        result.push(i);
   return result;
var tenToOneThousand = [].toOneThousand();
 Array.prototype.Search = function(d) {
        start = start || 0;
        end = end || this.length;
        var ind = Math.floor(end + start) / 2;
        if(!search) {return "Nothing to search";}
        if(result[ind] == search)
           { return ind;}
        else if(result[ind] < search)
            {return result.Search(search, ind, end);}
        else
            {return result.Search(search, start, ind);}

Array.prototype.toTwenty = function() {
  'use strict';
  var arr = [];
  var count = 0;
  for (var i = 1; i <= 20; i++) {
    count += i;
    arr.push(i);
  return arr;
...