Nodejs String Format format(obj)

Method Source Code

//Problem 1. Format with placeholders
////w w w  .  j a  v  a  2s .c om
//    Write a function that formats a string. The function should have placeholders, as shown in the example
//      Add the function to the String.prototype

String.prototype.format = function(obj){
    var placeHolders = this.match(/#{\w+}/g),
        prop,
        result = this;

    for (var i = 0; i < placeHolders.length; i++) {

        prop = placeHolders[i].substring(2, placeHolders[i].length - 1);
        if (obj[prop]){
            result = result.replace(placeHolders[i], obj[prop]);
        }
    }
    return result;
};

var options = {name: 'John'};
console.log('Hello, there! Are you #{name}?'.format(options));

var options2 = {name: 'John', age: 13};
console.log('My name is #{name} and I am #{age}-years-old'.format(options2));

Related

1. format(obj)

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

2. format(obj)

   String.prototype.format = function (obj) {
       var result = this.toString();
       for (var key in obj) {
           result = result.replace(new RegExp("{{" + key + "}}", "gi"), obj[key].toString());
       return result;
   };
   

3. format(obj)

   var path = require('path');
   var fs = require('fs');
   String.prototype.format = function(obj) {
       var args = arguments;
       var str = this;
       return str.replace(/\{[\w\d\._-]+\}/g, function(part) {
           part = part.slice(1, -1);
           var index = parseInt(part, 10);
           if (isNaN(index)) {
   ...
   

4. format(obj)

   String.prototype.format = function(obj) {
     var args = arguments;
     var str = this;
     return str.replace(/\{[\w\d\._-]+\}/g, function(part) {
       part = part.slice(1, -1);
       var index = parseInt(part, 10);
       if (isNaN(index)) {
         return dottedGet(obj, part);
       } else {
   ...
   

5. format(obj)

   function getParameterByName(name) {
       name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
       var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
           results = regex.exec(location.search);
       return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
   String.prototype.format = function (obj) {
       return this.replace(/\{\s*([^}\s]+)\s*\}/g, function (m, p1, offset, string) {
           return obj[p1]
   ...
   

6. format(obj)

   String.prototype.format = function(obj) {
     var args = arguments;
     var str = this;
     return str.replace(/\{[\w\d_-]+\}/g, function(part) {
       part = part.slice(1, -1);
       var index = parseInt(part, 10);
       if (isNaN(index)) {
         return obj[part];
       } else {
   ...
   

7. format(object)

   String.prototype.format = function (object) {
       var self=this;
       for (var item in object) {
           var replaceItem = object[item],
               regExp = new RegExp('#{' + item + '}');
           self=self.replace(regExp, replaceItem);
       return self;
   var object = {
       name: 'John',
       age: 15,
       gender: 'male'
   };
   var str = 'My name is #{name}, I am #{age}-years-old and my gender is #{gender}'.format(object);
   console.log('TASK 1:\n'+str);
   

8. format(options)

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

9. format(options)

   String.prototype.format = function(options) {
     var option,
       toReplace,
       str = this;
     for (option in options) {
       toReplace = new RegExp('#{' + option + '}');
       str = str.replace(toReplace, options[option]);
     console.log(str);
   ...