This document discusses different inheritance patterns in JavaScript: pseudoclassical, prototypal, and functional. Pseudoclassical inheritance uses constructor functions and the prototype property. Prototypal inheritance involves objects inheriting directly from other objects. Functional inheritance creates a new object using various methods, augments it with private variables and methods, and returns the object. Sample code is provided for each pattern to illustrate inheritance in JavaScript.

1. JavaScript
The good parts for humans
(part 6)
B Anjaneyulu Reddy
Email: anji.t6@gmail.com
Twitter: @_anji
www.evibe.in

2. Agenda
Day 5 revisit
Inheritance

3. Inheritance
Patterns
Pseudoclassical
Prototypal
Functional

4. Constructor functions
Sample 1
Pseudoclassical

5. Prototypal
Objects inherits from objects
Differential inheritance
Sample 2

6. Functional (1 of 2)
Create a function which has 4 steps
o It creates new object
- Object literal
- Constructor function with new keyword
- Object.create()
- call a function which returns an object
o It has private (local) instance variables and methods
o It augments that new object
o return that new object

7. Functional (2 of 2)
// pseudocode
var constructor = function(spec) {
var that,
other private instance variables;
that = a new object
Add privileged methods to that
return that;
}
Sample 3

8. Questions?

9. Thank You