April 2007
Intermediate to advanced
1728 pages
47h 51m
English
Content preview from JavaScript® Bible, Sixth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 7. Programming Fundamentals, Part II
IN THIS CHAPTER
How control structures make decisions
How to define functions
Where to initialize variables efficiently
What those darned curly braces are all about
The basics of data arrays
Your tour of programming fundamentals continues in this chapter with subjects that have more intriguing possibilities. For example, I show you how programs make decisions and why a program must sometimes repeat statements over and over. Before you're finished here, you also will learn how to use one of the most powerful information holders in the JavaScript language: the array.
Decisions and Loops
Every waking hour of every day, you make decisions of some kind; most of the time, you probably don't even realize it. Don't think so? Well, look at the number of decisions you make at the grocery store, from the moment you enter the store to the moment you clear the checkout aisle.
No sooner do you enter the store than you are faced with a decision. Based on the number and size of items you intend to buy, do you pick up a hand-carried basket or attempt to extricate a shopping cart from the metallic conga line near the front of the store? That key decision may have impact later, when you see a special offer on an item that is too heavy to put in the handbasket.
Next, you head for the food aisles. Before entering an aisle, you compare the range of goods stocked in that aisle with items on your shopping list. If an item you need is likely to be found in this aisle, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.