Covers the fundamentals of regular expressions, describing how they work, the most commonly used syntax, and applying methods for finding patterns in text.
Author: Michael Fitzgerald
Publisher: "O'Reilly Media, Inc."
ISBN: 9781449392680
Category: Computers
Page: 136
View: 534
Covers the fundamentals of regular expressions, describing how they work, the most commonly used syntax, and applying methods for finding patterns in text.To get a head start on introducing regular expressions, I'll start with an example. It's one that you've experienced hundreds of times. When you enter customer data online, many web forms ask you for an email address.
Author: Jörg Krause
Publisher: Apress
ISBN: 9781484225080
Category: Computers
Page: 48
View: 531
This book is your easy-to-digest and concise guide to regular expressions in JavaScript, this book teaches you the very basics and can be used in the browser or on the server. Explore and understand how to use regular expressions in all JavaScript environments. Presented in four key concept sections, Introducing Regular Expressions shows how to create and use regular expressions to accelerate your JavaScript development. What You'll Learn What regular expressions are and why you should use them Use useful expressions (including examples) Reference features and functions Use regular expressions in all JavaScript environments Who This Book Is For Developers of web applications who want to explore the capabilities of JavaScript based apps on both, client and server. It’s suitable for beginners that have a basic understanding of JavaScript already.Unraveling Regular Expressions, Step-by-Step Michael Fitzgerald. 9 Programming. Introducing. Regular. Expressions. If you're a programmer new to regular expressions, this easy-tofolloW guide is a great place to start.
Author: Michael Fitzgerald
Publisher: "O'Reilly Media, Inc."
ISBN: 9781449338893
Category: Computers
Page: 154
View: 480
If you’re a programmer new to regular expressions, this easy-to-follow guide is a great place to start. You’ll learn the fundamentals step-by-step with the help of numerous examples, discovering first-hand how to match, extract, and transform text by matching specific words, characters, and patterns. Regular expressions are an essential part of a programmer’s toolkit, available in various Unix utlilities as well as programming languages such as Perl, Java, JavaScript, and C#. When you’ve finished this book, you’ll be familiar with the most commonly used syntax in regular expressions, and you’ll understand how using them will save you considerable time. Discover what regular expressions are and how they work Learn many of the differences between regular expressions used with command-line tools and in various programming languages Apply simple methods for finding patterns in text, including digits, letters, Unicode characters, and string literals Learn how to use zero-width assertions and lookarounds Work with groups, backreferences, character classes, and quantifiers Use regular expressions to mark up plain text with HTML5CHAPTER 7 Introducing regular expressions As you become more familiar with UNIX or LINUX , there is one subject you will bump into repeatedly , and that is regular expressions . As you use the shell , the need to extract more than just ...
Author: D. S. W. Tansley
Publisher: Addison-Wesley Professional
ISBN: 0201674726
Category: Computers
Page: 504
View: 470
Learn how to create and develop shell scripts in a step-by-step manner increasing your knowledge as you progress through the book. Learn how to work the shell commands so you can be more productive and save you time.Regular expressions are an essential part of a programmer’s toolkit, available in various Unix utlilities as well as programming languages such as Perl, Java, JavaScript, and C#. When you’ve finished this book, you’ll be familiar with ...
Author: Michael Fitzgerald
Publisher: O'Reilly Media
ISBN: 9781449338909
Category: Computers
Page: 154
View: 595
If you’re a programmer new to regular expressions, this easy-to-follow guide is a great place to start. You’ll learn the fundamentals step-by-step with the help of numerous examples, discovering first-hand how to match, extract, and transform text by matching specific words, characters, and patterns. Regular expressions are an essential part of a programmer’s toolkit, available in various Unix utlilities as well as programming languages such as Perl, Java, JavaScript, and C#. When you’ve finished this book, you’ll be familiar with the most commonly used syntax in regular expressions, and you’ll understand how using them will save you considerable time. Discover what regular expressions are and how they work Learn many of the differences between regular expressions used with command-line tools and in various programming languages Apply simple methods for finding patterns in text, including digits, letters, Unicode characters, and string literals Learn how to use zero-width assertions and lookarounds Work with groups, backreferences, character classes, and quantifiers Use regular expressions to mark up plain text with HTML5If you need to get up and running quickly using regular expressions , you'll find yourself torn between having too little information to be productive and ... So turn to Lesson 1 , " Introducing Regular Expressions , ” and get to work .
Author: Ben Forta
Publisher: Sams Publishing
ISBN: 0672325667
Category: Computers
Page: 146
View: 656
Introduces regular expressions and how they are used, discussing topics including metacharacters, nomenclature, matching and modifying text, expression processing, benchmarking, optimizations, and loops.Chapter 1, Introducing Regular Expressions, will introducethe basics ofthe regularexpression syntax from a nonPythonspecific point ofview. Chapter 2,Regular Expressions withPython, will cover the Python'sAPIfor regularexpressions ...
Author: Félix López
Publisher: Packt Publishing Ltd
ISBN: 9781783283163
Category: Computers
Page: 110
View: 441
A short and straight to the point guide that explains the implementation of Regular Expressions in Python. This book is aimed at Python developers who want to learn how to leverage Regular Expressions in Python. Basic knowledge of Python is required for a better understanding.Introduces regular expressions and how they are used, discussing topics including metacharacters, nomenclature, matching and modifying text, expression processing, benchmarking, optimizations, and loops.
Author: Jeffrey E. F. Friedl
Publisher: "O'Reilly Media, Inc."
ISBN: 0596002890
Category: Computers
Page: 460
View: 837
Introduces regular expressions and how they are used, discussing topics including metacharacters, nomenclature, matching and modifying text, expression processing, benchmarking, optimizations, and loops."Regular expressions can make virtually every developer more productive, but many programmers don't use them because they've never learned how. In Learning Regular Expressions, best-selling author Ben Forta solves that problem.
Author: Ben Forta
Publisher: Addison-Wesley Professional
ISBN: 0134757068
Category: Computers
Page: 144
View: 460
Learn to use one of the most powerful text processing and manipulation tools available Regular expression experts have long been armed with an incredibly powerful tool, one that can be used to perform all sorts of sophisticated text processing and manipulation in just about every language and on every platform. That's the good news. The bad news is that for too long, regular expressions have been the exclusive property of only the most tech savvy. Until now. Ben Forta's Learning Regular Expressions teaches you the regular expressions that you really need to know, starting with simple text matches and working up to more complex topics, including the use of backreferences, conditional evaluation, and look-ahead processing. You'll learn what you can use, and you'll learn it methodically, systematically, and simply. Regular expressions are nowhere near as complex as they appear to be at first glance. All it takes is a clear understanding of the problem being solved and how to leverage regular expressions to solve them. Read and understand regular expressions Use literal text and metacharacters to build powerful search patterns Take advantage of advanced regular expression features, including lookahead and backreferences Perform powerful search-and-replace operations in all major professional editing tools Add sophisticated form and text processing to web applications Search for files using command-line tools like grep and egrep Use regular expressions in programming languages like JavaScript, Java, PHP, Python, Microsoft .NET, and C#, as well as in DBMSs including MySQL and Oracle Work with phone numbers, postal codes, social security numbers, IP addresses, URLs, email addresses, and credit card numbers Contents at a Glance 1 Introducing Regular Expressions 2 Matching Single Characters 3 Matching Sets of Characters 4 Using Metacharacters 5 Repeating Matches 6 Position Matching 7 Using Subexpressions 8 Using Backreferences 9 Looking Ahead and Behind 10 Embedding Conditions 11 Regular Expression Solutions to Common Problems Appendix A Regular Expressions in Popular Applications and LanguagesAs with most software problems, you can often find the solution to a regex conundrum by clarifying the requirements. Introducing the Regular Expression Syntax The following sections introduce Java's regular expression syntax.
Author: Mehran Habibi
Publisher: Apress
ISBN: 9781430207092
Category: Computers
Page: 280
View: 192
Expert author Habibi offers a look at what regular expressions are and how to use the Java library to process them. His book uses plenty of examples to show typical and atypical uses of the library, thus becoming a powerful learning tool. For instance, comprehensive examples for each and every regex method and class are given, along with advice on their appropriate use and performance considerations.