Nodejs Utililty Methods String Format

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

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 formatted = this;
    if(arguments.length == 1 && arguments[0] instanceof Object) {
        var args = arguments[0];
        for(var i in args) {
            var regexp = new RegExp('\\{' + i + '\\}', 'gi');
            formatted = formatted.replace(regexp, args[i]);
    } else if(arguments.length > 1) {
...

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

String.prototype.format = function() {
    var formattedString = this;
    var strArray = Array.prototype.slice.call(arguments);
    var pattern;
    strArray.forEach(function(value, index) {
        pattern = new RegExp("\\{" + index + "\\}", "g");
        formattedString = formattedString.replace(pattern, value && typeof value === 'string' ? value : '');
    });
    return formattedString;
...

String.prototype.format = function() {
  var formatted = this;
  for( var arg in arguments ) {
    formatted = formatted.replace("{" + arg + "}", arguments[arg]);
  return formatted;
};

String.prototype.format = function () {
    var formatted = this;
    if (arguments != null) {
        for (var i = 0; i < arguments.length; i++) {
            while (formatted.indexOf("{" + i + "}") > -1) {
                formatted = formatted.replace("{" + i + "}", arguments[i]);
    return formatted;
};

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 res = this;
    for (var i = 0; i < arguments.length; i++) {
        res = res.replace(new RegExp("\\{" + (i) + "\\}", "g"), arguments[i]);
    return res;
};

String.prototype.format = function() {
  var args = arguments;
  return this.replace(/\$\{([A-Za-z0-9_]+)\}/g, function(base, element, position) {
    for (var i = 0; i < args.length; i++) {
      if (args[i] != null && typeof(args[i][element]) != "undefined")
        return args[i][element];
    if (typeof(args[element - 1]) == "undefined")
      return base;
...