Nodejs Utililty Methods String Format

String.prototype.format = function(){
  var fn = String.format;
  switch (arguments.length) {
    case 1:
      return fn(this, arguments[0]);
    case 2:
      return fn(this, arguments[0], arguments[1]);
    case 3:
      return fn(this, arguments[0], arguments[1], arguments[2]);
...

String.prototype.format = function () {
  var str = this,
    args = arguments;
  return str.replace(String.prototype.format.regex, function(item) {
    var intVal = parseInt(item.substring(1, item.length - 1)),
      replace;
    if (intVal >= 0) {
      replace = args[intVal];
    } else if (intVal === -1) {
...

String.prototype.format = function() {
  var args = arguments;
  return this.replace(/{(\d+)}/g, function(match, number) { 
    return typeof args[number] != 'undefined'
      ? args[number]
      : match
    ;
  });
};
...

'use strict';
String.prototype.format = function() {
  var self = this;
  for(var i = 0; i < arguments.length; i += 1) {
    var reg = new RegExp("\\{" + i + "\\}", "gm");
    self = self.replace(reg, arguments[i]);
  return self;
};
...

String.prototype.format = function() {
    var args = arguments;
    return this.replace(/\$\{p(\d)\}/g, (match, id) => {
        return args[id]
    })
String.prototype.sid = function() {
    return `${this.substring(0, 7)}...`

String.prototype.format = function(){
  return this.replace(/(\d)(?=(\d{3})+(?!\d))/g, "$1,");
};

String.prototype.format = function() {
    var formatted = this;
    for (var i = 0; i < arguments.length; i++) {
        var regexp = new RegExp('%'+i, 'gi');
        formatted = formatted.replace(regexp, arguments[i]);
    return formatted;
};

String.prototype.format = function() {
    "use strict";
    var e = this.toString();
    if (!arguments.length) {
        return e;
    var t = typeof arguments[0],
        n = "string" == t || "number" == t ? Array.prototype.slice.call(arguments) : arguments[0];
    for (var i in n) {
...

String.prototype.format = function() {
    var formatted = this;
    for (var i = 0; i < arguments.length; i++) {
        var regexp = new RegExp('\\{'+i+'\\}', 'gi');
        formatted = formatted.replace(regexp, arguments[i]);
    return formatted;
};
function pad(n) {
...

String.prototype.format = function() { 
  s = this;
  if (arguments.length == 1 && arguments[0].constructor == Object) {
    for (var key in arguments[0]) {
      s = s.replace(new RegExp("\\{" + key + "\\}", "g"), arguments[0][key]);
  } else {
    for (var i = 0; i < arguments.length; i++) {
      s = s.replace(new RegExp("\\{" + (i+1) + "\\}", "g"), arguments[i]);
...