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CoffeeScript Application Development

You're reading from   CoffeeScript Application Development What JavaScript user wouldn't want to be able to dramatically reduce application development time? This book will teach you the clean, elegant CoffeeScript language and show you how to build stunning applications.

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Product type Paperback
Published in Aug 2013
Publisher Packt
ISBN-13 9781782162667
Length 258 pages
Edition 1st Edition
Languages
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Author (1):
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Ian Greenleaf Young Ian Greenleaf Young
Author Profile Icon Ian Greenleaf Young
Ian Greenleaf Young
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Table of Contents (19) Chapters Close

CoffeeScript Application Development
Credits
About the Author
Acknowledgements
About the Reviewers
www.PacktPub.com
Preface
1. Running a CoffeeScript Program FREE CHAPTER 2. Writing Your First Lines of CoffeeScript 3. Building a Simple Application 4. Improving Our Application 5. Classes in CoffeeScript 6. Refactoring with Classes 7. Advanced CoffeeScript Usage 8. Going Asynchronous 9. Debugging 10. Using CoffeeScript in More Places 11. CoffeeScript on the Server Index

CoffeeScript basics


Let's get started! We'll begin with something simple:

x = 1 + 1

You can probably guess what JavaScript this will compile to:

var x;
x = 1 + 1;

Statements

One of the very first things you will notice about CoffeeScript is that there are no semicolons. Statements are ended by a new line. The parser usually knows if a statement should be continued on the next line. You can explicitly tell it to continue to the next line by using a backslash at the end of the first line:

x = 1\
  + 1

It's also possible to stretch function calls across multiple lines, as is common in "fluent" JavaScript interfaces:

"foo"
  .concat("barbaz")
  .replace("foobar", "fubar")

You may occasionally wish to place more than one statement on a single line (for purely stylistic purposes). This is the one time when you will use a semicolon in CoffeeScript:

x = 1; y = 2

Both of these situations are fairly rare. The vast majority of the time, you'll find that one statement per line works great. You might feel a pang...

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