Errata

on page 4 of the sampler pdf
=================================
Example 1-4. Object-Oriented ViewModel
var mySecondViewModel = function() {
var self = this;

self.name = 'Steve Kennedy';

self.getName = function() {
return self.name;
}
=================================
i think this is meant to be a I.I.F.E.
otherwise below codes on page 5 will cause errors

Example 1-5. Accessing the name property
alert(mySecondViewModel.name); // access the property name
alert(mySecondViewModel.getName()); // access the function getName

I pulled the file cho1.html from the github repo and noted various errors when attempting open the file in both Chrome and FIrefox.
The first error in the browser console was: Uncaught Error: You cannot apply bindings multiple times to the same element. To correct this I did the following:
(1) Set the rendering of the name property in an element ID
<H1><span id="theName" data-bind="text: name">The Name Here</span></h1>
(2) Get the Element ID in the JavaScript code
var theElement = document.getElementById("theName");
(3) Clean the Element and then specify the element in the applyBindings constructor for the mySecondViewModel and myThirdViewModel ViewModels
ko.cleanNode(theElement);
ko.applyBindings(mySecondViewModel, theElement);

After this I then noted the following error:
Uncaught TypeError: mySecondViewModel.getName is not a function
This was corrected by João Nabais previous Errata entry. Here is my implementation of the mySecondViewModel View Model:
var mySecondViewModel = function() {
var self = this;

self.name = 'Steve Kennedy';

mySecondViewModel.prototype.getName = function() {
return self.name;
};
};
ko.cleanNode(theElement);
ko.applyBindings(mySecondViewModel, theElement);

The code:

alert(myFirstViewModel.name);

alert(mySecondViewModel.name); // access the property name
alert(mySecondViewModel.getName()); // access the function getName

Generates an Error. Probably the code should make use of the "Constructor Invocation Pattern":

alert(myFirstViewModel.name);

var secondVM = new mySecondViewModel();

alert(secondVM.name); // access the property name
alert(secondVM.getName()); // access the function getName

PS: I also changed the getName function (in order to make use of JS prototypal inheritance) from:

var mySecondViewModel = function(name) {
var self = this;

self.name = name;

self.getName = function() {
return self.name;
};
};

To:

var mySecondViewModel = function(name) {
var self = this;

self.name = name;
};

mySecondViewModel.prototype.getName = function() {
return this.name;
};

Best,

João.