Nodejs Utililty Methods String Format

String.prototype.format=function(options) {
    var string = this;
    for (var i in options) {
        var pattern = '#{' + (i) + '\\}';
        var regex = new RegExp(pattern, 'g');
        string = string.replace(regex, options[i]);
    return string;
var options = {name: 'John'};
console.log('Hello, there! Are you #{name}?'.format(options));
var options = {name: 'John', age: 13};
console.log('My name is #{name} and I am #{age}-years-old'.format(options));

var phraseOne = 'Hello, there! Are you #{name}?';
var phraseTwo = 'My name is #{name} and I am #{age}-years-old';
String.prototype.format = function (options) {
    var option,
        fullString = this;
    for (option in options) {
        var placeholder = /#\{\w+}/;
        fullString = fullString.replace(placeholder, options[option]);
    return fullString;
};
console.log(phraseOne.format({name: 'John'}));
console.log(phraseTwo.format({name: 'John', age: 13}));

var options = {name: 'John'};
String.prototype.format = function (options) {
    var result = this;
    function getNameOfPlaceholder(startIndex, text) {
        var name = '';
        for (var i = startIndex + 1; text[i] != '}'; i++) {
            name += text[i];
        return name;
...

String.prototype.format = function(options) {
  var prop,
  regex,
  result = this;
  for (prop in options) {
    regex = RegExp('#\{' + prop + '\}', 'gi');
    result = result.replace(regex, options[prop]);
  return result;
...

String.prototype.format = function (options) {
    var regex,
        input = this;
    for (var key in options) {
        regex = new RegExp('#{' + key + '}', 'g');
        input = input.replace(regex, options[key]);
    return input;
console.log('Original text is: Hello, there! Are you #{name}? and Object is: { name: \'John\' }')
console.log('Changed text is: ' + 'Hello, there! Are you #{name}?'.format({ name: 'John' }));
console.log('Original text is: My name is #{name} and I am #{age}-years-old).format(options) and object is: {name: \'Johnny\', age: 21} ');
console.log('Changed text is: ' + 'My name is #{name} and I am #{age}-years-old)'.format({name: 'Johnny', age: 21}));

"use strict";
var formatPlace = function (options, str) {
    function replacer(match, i) {
        i = i.substring(2, i.length - 1);
        return options[i];
    return str.replace(/(#{[^{}]+})/gm, replacer);
};
String.prototype.format = function(options){
...

String.prototype.format = function(options) {
    var prop,
        result = this;
    for (prop in options) {
        result = result.replace(new RegExp('#{' + prop + '}', 'g'), options[prop]);
    return result;
};
var options01 = { name: 'John' };
...

String.prototype.format = function(opts) {
    var option,
        regex,
        formatted = this;
    for (option in opts) {
        regex = new RegExp('#{' + option + '}', 'g');
        formatted = formatted.replace(regex, opts[option]);
    return formatted;
...

String.prototype.format = function(opts) {
    var source = this,
        data = Array.prototype.slice.call(arguments, 0),
        toString = Object.prototype.toString;
    if (data.length) {
        data = data.length == 1 ?
            (opts !== null && (/\[object Array\]|\[object Object\]/.test(toString.call(opts))) ? opts : data) : data;
        return source.replace(/%\{(.+?)\}/g, function(match, key) {
            var replacer = data[key];
...

String.prototype.format = function(param) {
    var formatted = this;
    for(i in param ){
        var regexp = new RegExp('\\{'+i+'\\}', 'gi');
        formatted = formatted.replace(regexp, param[i]);
    return formatted;
};