Nodejs Utililty Methods Array Range

Array.prototype.range = function(){
  var a = this.natsort();
  return this[a.length-1]-a[0];
};

Array.prototype.range = function() {
    function isArray(instance) {
        return Object.prototype.toString.call(instance) !== '[object Array]';
    if (!isArray(this)) {
        throw new TypeError("`this` must be Array, not " + typeof this);
    if (arguments.length === 0) {
        throw new TypeError("Missing required argument(s)");
...

Array.prototype.range = function() {
  var min = null,
    max = null,
    sum = null,
    i, len;
  for (i = 0, len = this.length; i < len; ++i) {
    var elem = this[i];
    sum += elem;
    if (min === null || min > elem) min = elem;
...

Array.range = function (end, step) {
  var array = [];
  for (var i = step; i <= end; i += step) {
    array.push(i);
  return array;

Array.prototype.range = function(first, second) {
  var range = []
  console.log(typeof second)
  if (typeof second === 'undefined') {
    for (var i = 0; i < first; i++) {
      range.push(i)
    return range
  for (var i = first; i < second; i++) {
    range.push(i)
  return range

Array.prototype.range = function(from, to) {
  var result = []
  while (from <= to)
    result.push(from++)
  return result

Array.prototype.range = function(from, to) {
  var i, result = [];
  for (i = from; i<= to; i++) {
    result.push(i);
  return result;
};
console.log([].range(1, 10));

Array.range  = function(start, count) {
  var arr = [],
      val = start;
  while(count > 0) {
    arr.push(val);
    count--;
    val++;
  return arr;
...

Array.range = function (start, end) {
  var a = [], i;
  for (i = start; i < end; i += 1) {
    a[i] = i;
  return a;

Array.prototype.range = function(start, end) {
    var result = [];
    for (var i = start; i <= end; i++) {
        result.push(i);
    return result;