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Understanding Ruby Regexp

Learn Ruby Regular Expressions step-by-step from beginner to advanced levels with hundreds of examples and exercises. Visit https://youtu.be/QNsCzVeZH78 for a short video about the book.

Understanding Ruby RegExp ebook cover image

The book also includes exercises to test your understanding, which are presented together as a single file in this repo — Exercises.md.

For solutions to the exercises, see Exercise_solutions.md.

See Version_changes.md to keep track of changes made to the book.


E-book

For a preview of the book, see sample chapters.

The book can also be viewed as a single markdown file in this repo. See my blogpost on generating pdfs from markdown using pandoc if you are interested in the ebook creation process.

For the web version of the book, visit https://learnbyexample.github.io/Ruby_Regexp/


Feedback

⚠️ ⚠️ Please DO NOT submit pull requests. Main reason being any modification requires changes in multiple places.

I would highly appreciate it if you'd let me know how you felt about this book. 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:


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. Modifiers
  15. Unicode
  16. Further Reading

Acknowledgements

Special thanks to Allen Downey, an attempt at translating his book Think Python to Think Ruby gave me the confidence to publish my own book.


License

The book is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The code snippets are licensed under MIT, see LICENSE file.

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Learn Ruby Regexp step-by-step from beginner to advanced levels with plenty of examples and exercises.

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