Understanding JavaScript RegExp
Understanding JavaScript RegExp
Example based guide to mastering JavaScript regular expressions
About the Book
About
Scripting and automation tasks often need to extract particular portions of text from input data or modify them from one format to another.
This book will help you learn JavaScript Regular Expressions, a mini-programming language for all sorts of text processing needs.
The book heavily leans on examples to present features of regular expressions one by one. It is recommended that you manually type each example and experiment with them.
Exercises are included to test your understanding. Reference solutions are also provided.
Prerequisites
You should be familiar with programming basics. You should also have a working knowledge of JavaScript syntax and functional programming concepts like map and filter.
You are also expected to get comfortable with reading documentation, searching online, visiting external links provided for further reading, tinkering with illustrated examples, asking for help when you are stuck and so on. In other words, be proactive and curious instead of just consuming the content passively.
Testimonials
Literally was having a mini-breakdown about not understanding Regex in algorithm solutions the other day and now I'm feeling so much better, so thank YOU! I genuinely feel like I'm developing the skill for spotting when and where to use them after so much practice! — feedback on twitter
GitHub repo
Visit https://github.com/learnbyexample/learn_js_regexp for markdown source, example files, exercise solutions and other details related to the book.
Feedback and Errata
I would highly appreciate it if you'd let me know how you felt about this ebook. It could be anything from a simple thank you, pointing out a typo, mistakes in code snippets, which aspects of the book worked for you (or didn't!) and so on. Reader feedback is essential and especially so for self-published authors.
You can reach me via:
- Issue Manager: https://github.com/learnbyexample/learn_js_regexp/issues
- E-mail: learnbyexample.net@gmail.com
- Twitter: https://twitter.com/learn_byexample
About the Author
Team Discounts
Get a team discount on this book!
Bundles that include this book
Table of Contents
1. Preface
2. Why is it needed?
3. RegExp introduction
4. Anchors
5. Alternation and Grouping
6. Escaping metacharacters
7. Dot metacharacter and Quantifiers
8. Interlude: Tools for debugging and visualization
9. Working with matched portions
10. Character class
11. Groupings and backreferences
12. Interlude: Common tasks
13. Lookarounds
14. Unicode
15. Further Reading
Other books by this author
The Leanpub 60 Day 100% Happiness Guarantee
Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.
You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!
So, there's no reason not to click the Add to Cart button, is there?
See full terms...
Earn $8 on a $10 Purchase, and $16 on a $20 Purchase
We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.
(Yes, some authors have already earned much more than that on Leanpub.)
In fact, authors have earnedover $13 millionwriting, publishing and selling on Leanpub.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
