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Here are some exciting deals for my programming ebooks as well as from other creators.

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I just published a new version of "Understanding JavaScript RegExp" ebook. Added examples for d and v flags, corrected many mistakes, improved examples, exercises and so on.

This book will help you learn JavaScript Regular Expressions step-by-step from beginner to advanced levels with hundreds of examples and exercises.

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I am pleased to announce a new version of my Perl One-Liners Guide ebook. Examples, exercises, solutions, descriptions and external links were added/updated/corrected.

When it comes to command line text processing, there are several well known tools like grep for filtering, sed for substitution and awk for field processing. Compared to such tools, Perl has a feature rich regular expression engine, plenty of builtin modules and a thriving ecosystem. Another advantage is that Perl is more portable.

This ebook will show examples for filtering and substitution features, field processing, using standard and third-party modules, multiple file processing, how to construct solutions that depend on multiple records, how to compare records and fields between two or more files, how to identify duplicates while maintaining input order and so on.

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I am pleased to announce a new version of my CLI text processing with GNU awk ebook. Examples, exercises, solutions, descriptions and external links were added/updated/corrected.

Learn the GNU awk command step-by-step from beginner to advanced levels with hundreds of examples and exercises. This book will dive deep into field processing, show examples for filtering features, multiple file processing, how to construct solutions that depend on multiple records, how to compare records and fields between two or more files, how to identify duplicates while maintaining input order and so on. Regular expressions will also be discussed in detail.

Having an interactive program that automatically loads questions and checks the solution is immensely helpful to have while learning a topic. I've written TUI apps with plenty of beginner to intermediate level exercises for GNU grep, GNU sed and GNU awk.

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I am pleased to announce a new version of my CLI text processing with GNU sed ebook. Examples, exercises, solutions, descriptions and external links were added/updated/corrected.

This book will help you learn the GNU sed command step-by-step from beginner to advanced levels with hundreds of examples and exercises. In addition to command options, regular expressions will also be discussed in detail.

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I am pleased to announce a new version of my CLI text processing with GNU grep and ripgrep ebook. Examples, exercises, solutions, descriptions and external links were added/updated/corrected. The chapter on ripgrep was changed significantly to focus mostly on the differences compared to GNU grep.

This book will help you learn these commands step-by-step from beginner to advanced levels with hundreds of examples and exercises.

Having an interactive program that automatically loads questions and checks the solution is wonderful to have while learning a topic. This TUI app has beginner to advanced level exercises for Python regular expressions. There are more than 100 exercises covering both the builtin re and third-party regex module.

This TUI application is intended as an interactive playground for Python Regular Expressions. The app also includes a comprehensive cheatsheet and several interactive examples.

Hello!

I just published a new version of "Understanding Python re(gex)?" ebook. I caught up to new features like possessive quantifiers, corrected many mistakes, improved examples, exercises and so on.

This book will help you learn Python Regular Expressions step-by-step from beginner to advanced levels with hundreds of examples and exercises. The standard library re and the third-party regex module are covered in this book.