Regular expression crosswords are crossword puzzle games, where the crossword clues are defined using regular expressions! Essentially, you're given the regular expressions, and you must find the correct letters in the horizontal and vertical lines of the grid (the combination of regular expression patterns tells you which letters are allowed or not allowed). Regular expressions might seem arcane, but if you do any kind of software, they are a powerful tool.

If you are writing software or using tools, or just about any programming language, regular expressions can simplify your life. Even if you don't need them all the time, regular expression searches can help you identify, search, replace or censor text data easily.

This book will help sharpen your skills. Everybody can give regular expression crosswords a try, and they're a great way for learners to master regular expressions and for experts to refresh their memory.

If you enjoy crossword puzzles, and regular expressions, then you should enjoy this book. All the solutions for the crosswords are provided at the back of the book so you can check your answers against them.

. .