Sign In Start Free Trial

Book Overview & Buying
Table Of Contents
Feedback & Rating

Javascript Regular Expressions

By : Loiane Groner, Gabriel Manricks

4 (7)

Javascript Regular Expressions

4 (7)

By: Loiane Groner, Gabriel Manricks

Overview of this book

This book is ideal for JavaScript developers and programmers who work with any type of user entry data and want sharpen their skills to become experts.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started with Regex

1. Getting Started with Regex

It's all about patterns

Regex in JavaScript

Building our environment

Summary

2. The Basics

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

3. Special Characters

3. Special Characters

Nonvisual constraints

Defining nongreedy quantifiers

Matching groups in Regex

Summary

4. Regex in Practice

4. Regex in Practice

Regular expressions and form validation

Validating fields

Manipulating data

Summary

5. Node.js and Regex

5. Node.js and Regex

Setting up Node.js

Getting started with our application

The anatomy of an Apache log file

Summary

A. JavaScript Regex Cheat Sheet

A. JavaScript Regex Cheat Sheet

Character classes

Character sets

Boundaries

Grouping, alternation, and back reference

Quantifiers

JavaScript regular expressions methods

Index

Index

Customer Reviews

4 (7)

5 star

28.6%

4 star

57.1%

3 star

0%

2 star

14.3%

1 star

0%

Character classes

In the following table, you can find the patterns for character classes, which tell the Regex to match a single character:

Pattern	Description	Example
`.`	This matches any character, except newline or another unicode line terminator, such as (`\n, \r, \u2028` or `\u2029`).	`/f.o/` matches "fao", "feo", and "foo"
`\w`	This matches any alphanumeric character, including the underscore. It is equivalent to `[a-zA-Z0-9_]`.	`/\w/` matches "f" in "foo"
`\W`	This matches any single nonword character. It is equivalent to `[^a-zA-Z0-9_]`.	`/\W/` matches "%"in "100%"
`\d`	This matches any single digit. It is equivalent to `[0-9]`.	`/\d/` matches "1" in "100"
`\D`	This matches any non digit. It is equivalent to `[^0-9]`.	`/\D/` matches "R" in "R2-D2"
`\s`	This matches any single space character. It is equivalent to `[ \t\r\n\v\f]`.	`/\s/` matches " " in "foo...

Visually different images

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Javascript Regular Expressions

Search

Your notes and bookmarks