Private attributes and functions in javascript.

fiddle.html

<h1 id="qunit-header">Unit Tests</h1>
<h2 id="qunit-banner"></h2>
<div id="qunit-testrunner-toolbar"></div>
<ol id="qunit-tests"></ol>
<div id="qunit-fixture"></div>​

fiddle.js

/* 

This shown how to use private attributes and private functions in javascript.
From the page of Douglas Crockford  http://www.crockford.com/javascript/private.html

*/ 
function Person(attrs) {
    // Private attributes
    var first_name = attrs.firstName;
    var last_name = attrs.lastName;

    // Private method
    function complete_name() {
        return first_name + " " + last_name;
    }

    // Privileged method
    this.name = complete_name;
}


var john = new Person({
    firstName: 'John',
    lastName: 'Doe'
});

test("the function name() must be public (accessible from outside)", function() {
    equal(john.name(), 'John Doe');
});

test("the attribute first_name must be private", function() {
    equal(john.hasOwnProperty('first_name'), false);
});

test("the function complete_name() must be private", function() {
    equal(john.hasOwnProperty('complete_name'), false);
});

fiddle.manifest

name: Private attributes and functions in javascript
description: This shown how to use private attributes and private functions in javascript. From the blog of Douglas Crockford (http://www.crockford.com/javascript/private.html)
authors:
  - Maxi Dello Russo
resources:
  - http://code.jquery.com/qunit/qunit-1.10.0.js
  - http://code.jquery.com/qunit/qunit-1.10.0.css
normalize_css: no

http://jsfiddle.net/gh/gist/mootools/1.2/3932950/