Nodejs Utililty Methods String Format

String.prototype.format = function(args){
    var this_string = '';
    for (var char_pos = 0; char_pos < this.length; char_pos++) {
        this_string = this_string + this[char_pos];
    for (var key in args) {
        var string_key = '{' + key + '}';
        this_string = this_string.replace(new RegExp(string_key, 'g'), args[key]);
    return this_string;
};

String.prototype.format = function(args) {
    var result = this;
    if (arguments.length < 1) {
        return result;
    var data = arguments;      
    if (arguments.length == 1 && typeof (args) == "object") {
        data = args;
    for (var key in data) {
        var value = data[key];
        if (undefined != value) {
            result = result.replace("{" + key + "}", value);
    return result;

String.prototype.format = function(args) {
  return this.replace(/{([^{}]*)}/g, function (fullMatch, subMatch) {
    var value = args[subMatch];
    return (typeof value === 'string' || typeof value === 'number') ? value : fullMatch;
  });
};

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

String.prototype.format = function(args) { 
  if (arguments.length>0) {
    var result = this; 
    if (arguments.length == 1 && typeof (args) == "object") { 
      for (var key in args) { 
        var reg=new RegExp ("({"+key+"})","g"); 
        result = result.replace(reg, args[key]); 
    } else { 
...

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

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

String.prototype.format = function(args) {
    var result = this;
    if (arguments.length < 1) {
        return result;
    var data = arguments; 
    if (arguments.length == 1 && typeof (args) == "object") {
        data = args;
    for ( var key in data) {
        var value = data[key];
        if (undefined != value) {
            result = result.replaceAll("\\{" + key + "\\}", value);
    return result;

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

'use strict';
String.prototype.format = function (args) {
  if (arguments.length > 0) {
    var result = this;
    if (arguments.length == 1 && typeof (args) == "object") {
      for (var key in args) {
        result = result.replace(new RegExp("({" + key + "})", "g"), args[key]);
    else {
      for (var i = 0; i < arguments.length; i++) {
        if (arguments[i] == undefined) {
          return "";
        else {
          var reg = new RegExp("({[" + i + "]})", "g");
          result = result.replace(reg, arguments[i]);
    return result;
  else {
    return this;
};