Nodejs Utililty Methods String Format

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.replaceAll = function (find, replace) {
...

String.prototype.format = function() {
    var args = arguments;
    return this.replace(/\{(\d+)\}/g, function() {
        return args[arguments[1]];
    });
};

String.prototype.format = function () {
  var formatted = this;
  for (var prop in arguments[0]) {
    var regexp = new RegExp('\\{' + prop + '\\}', 'gi');
    formatted = formatted.replace(regexp, arguments[0][prop]);
  return formatted;
};
if (typeof String.prototype.trim !== 'function') {
...

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() {
    var txt = this, i = arguments.length; while (i--) {
        txt = txt.replace (
            new RegExp('\\{' + i + '\\}', 'gm'), arguments[i]
        );
    return txt;
};

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

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

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

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

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