Object Oriented Programming (OOP) in JavaScript

In the world of JavaScript, you can't throw a rock without hitting something that is related to Objects. Understanding what objects are and how to work with them is pretty much one of the most important things you need to master, and this page will help take you far on that journey!

CHAPTER 1

Of Pizza, Types, Primitives, and Objects

Learning about the variety of built-in values in JavaScript that you can use is an important part of being awesome. You DO want to be awesome, don't you?
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CHAPTER 2

Strings

Learn all about how to work with text in JavaScript by studying and befriending the String object.
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CHAPTER 3

When Primitives Behave Like Objects

Learn why the relationship between primitives and objects is complicated...especially when dealing with the built-in types.
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CHAPTER 4

Arrays

Learn how to perform common tasks such as declaring, adding, removing, and merging arrays in JavaScript.
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CHAPTER 5

Numbers

Learn how to work with numbers in JavaScript by looking at simple math operators, incrementers / decrementers, hex values, octal values, the Math object, and more!
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CHAPTER 6

A Deeper Look at Objects

Learn how to work with the Object object, use Object.create, understand inheritance, and befriend the prototype.
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CHAPTER 7

Extending Built-in Objects

Take your existing built-in objects and kick them up a few notches by learning how to extend them.
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CHAPTER 8

Booleans and the Stricter === and !== Operators

Take your knowledge of booleans up a few levels by looking at the Boolean function and the stricter equality and inequality operators.
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CHAPTER 9

null and undefined

Learn about the mysterious null and undefined built-in types and what role they play in your code.
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What we've learned so far doesn't really lend itself to some sweet examples that you can deconstruct and wow your friends with, but below are a few unsweet examples instead :P

example

Shuffling an Array

Learn how to use the Fisher-Yates / Knuth approach to shuffle the contents of an array in JavaScript.
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Picking a Random Item from an Array

Using just a single line of code, learn how to randomly pick an item from an array.
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Going from a String to a Number

Learn all about how to use the parseInt and parseFloat functions along with some JS tricks to easily go from a string to a number.
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Hashtables vs. Arrays

Learn about the similarities and differences between hashtables and arrays.
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Rounding Numbers

Learn how to use the Math.round, Math.floor, and Math.ceil functions to round numbers to various degrees of precision.
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The Devowelizer

Test your ability to work with strings in this fun challenge where your goal is to remove all vowels from some text.
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Swapping Items in an Array

Did you know that there is no built-in way to swap two items in an array? In this article, you'll learn how to fix that!
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Object Oriented Programming (OOP) in JavaScript

Of Pizza, Types, Primitives, and Objects

Strings

When Primitives Behave Like Objects

Arrays

Numbers

A Deeper Look at Objects

Extending Built-in Objects

Booleans and the Stricter === and !== Operators

null and undefined

Shuffling an Array

Picking a Random Item from an Array

Going from a String to a Number

Hashtables vs. Arrays

Rounding Numbers

The Devowelizer

Swapping Items in an Array

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