JavaScript Regular Expressions

Leverage the power of regular expressions to create an engaging user experience

JavaScript Regular Expressions

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Loiane Groner, Gabriel Manricks

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Leverage the power of regular expressions to create an engaging user experience
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Book Details

ISBN 139781783282258
Paperback112 pages

Book Description

Regular expressions are patterns or templates that allow you to define a set of rules in a natural yet vague way, giving you the ability to match and validate text. Therefore, they have been implemented in nearly every modern programming language. JavaScript's implementation allows us to perform complex tasks with a few lines of code using regular expressions to match and extract data out of text.

This book starts by exploring what a pattern actually is and how regular expressions express these patterns to match and manipulate user data. You then move on to learning about the use of character classes to define a wild character match, a digit match, and an alphanumeric match. You will then learn to manipulate text and shorten data in URLs, paths, markup, and data exchange, as well as other advanced Regex features.

Finally, you will work through real-world examples, both in the browser and on the server side using Node.js.

Table of Contents

Chapter 1: Getting Started with Regex
It's all about patterns
Regex in JavaScript
Building our environment
Summary
Chapter 2: The Basics
Defining vague matchers in Regex
Defining ranges in Regex
Defining multipliers in Regex
Defining custom quantifiers
Matching alternated options
Creating a Regex for a telephone number
Summary
Chapter 3: Special Characters
Nonvisual constraints
Defining nongreedy quantifiers
Matching groups in Regex
Summary
Chapter 4: Regex in Practice
Regular expressions and form validation
Validating fields
Manipulating data
Summary
Chapter 5: Node.js and Regex
Setting up Node.js
Getting started with our application
The anatomy of an Apache log file
Summary

What You Will Learn

  • Structure your patterns and model different types of constraints
  • Clean and optimize code with Regex's processing power
  • Solve common use cases and situations
  • Extract different types of fields correctly
  • Embed regular expressions both in your UI and on the backend
  • Efficiently create guard clauses in your functions using patterns
  • Create blank capture groups to handle inconsistent data
  • Capture parts of a pattern in a group to display, replace, or use character sets to match characters

Authors

Table of Contents

Chapter 1: Getting Started with Regex
It's all about patterns
Regex in JavaScript
Building our environment
Summary
Chapter 2: The Basics
Defining vague matchers in Regex
Defining ranges in Regex
Defining multipliers in Regex
Defining custom quantifiers
Matching alternated options
Creating a Regex for a telephone number
Summary
Chapter 3: Special Characters
Nonvisual constraints
Defining nongreedy quantifiers
Matching groups in Regex
Summary
Chapter 4: Regex in Practice
Regular expressions and form validation
Validating fields
Manipulating data
Summary
Chapter 5: Node.js and Regex
Setting up Node.js
Getting started with our application
The anatomy of an Apache log file
Summary

Book Details

ISBN 139781783282258
Paperback112 pages
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