var r = new XMLHttpRequest();

r.open("POST", "http://httpbin.org/post", true);
r.setRequestHeader('Content-Type', 'application/json');

r.onreadystatechange = function () {
  if (r.readyState !== 4 || r.status !== 200) {
      return;
  }
  console.log(r.responseText);
};

r.send("password=qwerty");

vanilla.js

MongoDB is an open source NoSQL database. These days mongodb is getting more popularity between web developers for their processing speed. And for PHP5 we all are aware that it is use widely use for faster development.

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sudo apt-get install php5-mcrypt
sudo ln -s /etc/php5/conf.d/mcrypt.ini /etc/php5/mods-available
sudo php5enmod mcrypt 
sudo service apache2 restart

What is..

Knockout.js is a javascript library that allows us to bind html elements against any data model. It provides a simple two-way data binding mechanism between your data model and UI means any changes to data model are automatically reflected in the DOM(UI) and any changes to the DOM are automatically reflected to the data model.

What is not..

Knockout.js is not a replacement of jQuery, Prototype, or MooTools. It doesn’t attempt to provide animation, generic event handling, or AJAX functionality (however, Knockout.js can parse the data received from an AJAX call). Knockout.js is focused only on designing scalable and data-driven UI.

Knockout.js uses a Model-View-ViewModel (MVVM) design pattern in which the model is your stored data, and the view is the visual representation of that data (UI) and ViewModel acts as the intermediary between the model and the view

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Knockout.JS

JavaScript is a very flexible object-oriented language when it comes to syntax. In this article you can find three ways of defining and instantiating an object. Even if you have already picked your favorite way of doing it, it helps to know some alternatives in order to read other people's code.

It's important to note that there are no classes in JavaScript. Functions can be used to somewhat simulate classes, but in general JavaScript is a class-less language. Everything is an object. And when it comes to inheritance, objects inherit from objects, not classes from classes as in the "class"-ical languages.

• Using a function
  • Methods defined internally
  • Methods added to the prototype
• Using object literals
• Singleton using a function

Read the article here.