Regex Quick Syntax Reference

Understanding and Using Regular Expressions

Paperback Engels 2018 9781484238752
Verwachte levertijd ongeveer 9 werkdagen

Samenvatting

This quick guide to regular expressions is a condensed code and syntax reference for an important programming technique. It demonstrates regex syntax in a well-organized format that can be used as a handy reference, showing you how to execute regexes in many languages, including JavaScript, Python, Java, and C#.
The Regex Quick Syntax Reference features short, focused code examples that show you how to use regular expressions to validate user input, split strings, parse input, and match patterns. Utilizing regular expressions to deal with search/replace and filtering data for backend coding is also covered. 
You won’t find any bloated samples, drawn out history lessons, or witty stories in this book. What you will find is a language reference that is concise and highly accessible. The book is packed with useful information and is a must-have for any programmer.
What You Will LearnFormulate an expression
Work with arbitrary char classes, disjunctions, and operator precedence
Execute regular expressions and visualize using finite state machines
Deal with modifiers, including greedy and lazy loops 
Handle substring extraction from regex using Perl 6 capture groups, capture substrings, and reuse substrings 
Who This Book Is For
If you have dealt with at least one programming language, chances are you know enough to understand regular expressions, and the examples in this book will help you develop proficiency.

Specificaties

ISBN13:9781484238752
Taal:Engels
Bindwijze:paperback
Uitgever:Apress

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Inhoudsopgave

1. An Introduction to Regular Expressions.- 2. Regex Syntax 101.- 3. Executing Regular Expressions.- 4. Visualizing Regex Execution using Finite State Machines.- 5. Repeat modifiers.- 6. Character Sets and Character Classes.- 7. Substring Extraction from Regular Expressions.- 8. Lookahead and Lookbehind.- 9. Maintaining Regular Expressions.- 10. Optimizing regular expressions.- 11. Parsing HTML Code and URL Query Strings with Regular Expressions.- Afterword: This is not the end, but the beginning.

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        Regex Quick Syntax Reference