Question

I am trying to learn object oriented javascript. Why is this call to an object method not working (no alert)?

http://jsfiddle.net/hxPqJ/2/

When you click on the link, an alert is supposed to appear stating how old Bob is.

In case the link ever disappears, here is the HTML:

<a href="#" onclick="bob.say()">eh</a>​

and here is my javascript.

function guy(person_name) {
  this.name = person_name;
  this.age = 32;
  this.say = function() {
    alert(this.name + " is " + this.age);
    return false;
  }
}

  var bob = new guy("Bob");

​
Chrome Web Developer Console states

Uncaught ReferenceError: bob is not defined

However, I think I defined bob with var bob = new guy("Bob");.

Answer 1

You are missing the closing } on say().

Beyond that, you must not return a value from the object constructor function. Doing so will simply set the variable bob to false.

function Guy(person_name) {
  this.name = person_name;
  this.age = 32;
  this.say = function() {
    alert(this.name + " is " + this.age);};
}

var bob = new Guy("Bob");

Note also that JavaScript conventions typically dicatate that an object constructor be capitalized like function Guy()

Here is the updated fiddle.