In this video we're going to begin looking at functions, which are a way of …packaging up lines of code that you're going to use repeatedly and make them …into one callable and separately maintainable unit. …So we're going to start out with these four lines of code. …Just four lines of console log that make animal noises, something very important. …So of course, if I'm going to do this repeatedly, in the console it's easy …enough, I can just hit the up arrow and get the same lines of coding again and …make them fire again. And if I'm writing a Java script file, I …could copy and paste the same thing over and over again.…
So for example if I ever need to change it so, say, this first one is not arf but …neigh or what have you, I would have to go back and change each instance of that …in my code, and that's tedious. Perhaps you could just say it's silly. …So, what you would do in that case is define a function, which would wrap up …all these lines into a single unit that I can then use over and over again. …
- Enabling Firebug and web inspectors
- Using a text editor
- Declaring and assigning a variable
- Booleans and the quest for truth
- Working with objects and arrays
- Using operators and control structures
- Iterating with loops
- Objects, references, and functions
- Understanding variable scope
Skill Level Beginner
Q: In "How to enable Firebug and web inspectors," at the Chrome Canary part, the author mentions going to the View menu, and then Developer. My Canary has no menu bar. The author uses a Mac, whereas I have Windows. How do I get to the same place?
A: Click the menu button at the top right of Chrome, select More Tools, and then choose Developer Tools.
1. Getting Started
Our friend, the text editor3m 35s
2. Variables and Types
3. Objects, Arrays, and More
4. Operators and Control Structures
5. Iterating with Loops
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