Michael Fitzgerald

Introducing Regular Expressions (eBook, ePUB)

Unraveling Regular Expressions, Step-by-Step

• Format: ePub

Produktbeschreibung

If youre a programmer new to regular expressions, this easy-to-follow guide is a great place to start. Youll 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 programmers toolkit, available in various Unix utlilities as well as programming languages such as Perl, Java, JavaScript, and C#. When youve finished this book, youll be familiar with the most commonly used syntax in regular expressions, and youll understand how using them will save you considerable time.Discover what regular expressions are and how they workLearn many of the differences between regular expressions used with command-line tools and in various programming languagesApply simple methods for finding patterns in text, including digits, letters, Unicode characters, and string literalsLearn how to use zero-width assertions and lookaroundsWork with groups, backreferences, character classes, and quantifiersUse regular expressions to mark up plain text with HTML5

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Produktdetails

• Verlag: O'Reilly Media
• Seitenzahl: 154
• Erscheinungstermin: 10. Juli 2012
• Englisch
• ISBN-13: 9781449338893
• Artikelnr.: 42123717

Autorenporträt

Michael Fitzgerald describes Ruby as "my favorite language so far" and is working regularly with Ruby and the Rails framework. He has written over 150 Ruby programs for testing and demonstration, and has been developing a library of sample Ruby code. He is the author of Learning XSLT and XML Hacks, and co-author on the XML Pocket Reference.

Inhaltsangabe

Preface
Who Should Read This Book
What You Need to Use This Book
Conventions Used in This Book
Using Code Examples
Safari® Books Online
How to Contact Us
Acknowledgments
Chapter 1: What Is a Regular Expression?
1.1 Getting Started with Regexpal
1.2 Matching a North American Phone Number
1.3 Matching Digits with a Character Class
1.4 Using a Character Shorthand
1.5 Matching Any Character
1.6 Capturing Groups and Back References
1.7 Using Quantifiers
1.8 Quoting Literals
1.9 A Sample of Applications
1.10 What You Learned in Chapter 1
1.11 Technical Notes
Chapter 2: Simple Pattern Matching
2.1 Matching String Literals
2.2 Matching Digits
2.3 Matching Non-Digits
2.4 Matching Word and Non-Word Characters
2.5 Matching Whitespace
2.6 Matching Any Character, Once Again
2.7 Marking Up the Text
2.8 What You Learned in Chapter 2
2.9 Technical Notes
Chapter 3: Boundaries
3.1 The Beginning and End of a Line
3.2 Word and Non-word Boundaries
3.3 Other Anchors
3.4 Quoting a Group of Characters as Literals
3.5 Adding Tags
3.6 What You Learned in Chapter 3
3.7 Technical Notes
Chapter 4: Alternation, Groups, and Backreferences
4.1 Alternation
4.2 Subpatterns
4.3 Capturing Groups and Backreferences
4.4 Non-Capturing Groups
4.5 What You Learned in Chapter 4
4.6 Technical Notes
Chapter 5: Character Classes
5.1 Negated Character Classes
5.2 Union and Difference
5.3 POSIX Character Classes
5.4 What You Learned in Chapter 5
5.5 Technical Notes
Chapter 6: Matching Unicode and Other Characters
6.1 Matching a Unicode Character
6.2 Matching Characters with Octal Numbers
6.3 Matching Unicode Character Properties
6.4 Matching Control Characters
6.5 What You Learned in Chapter 6
6.6 Technical Notes
Chapter 7: Quantifiers
7.1 Greedy, Lazy, and Possessive
7.2 Matching with *, +, and ?
7.3 Matching a Specific Number of Times
7.4 Lazy Quantifiers
7.5 Possessive Quantifiers
7.6 What You Learned in Chapter 7
7.7 Technical Notes
Chapter 8: Lookarounds
8.1 Positive Lookaheads
8.2 Negative Lookaheads
8.3 Positive Lookbehinds
8.4 Negative Lookbehinds
8.5 What You Learned in Chapter 8
8.6 Technical Notes
Chapter 9: Marking Up a Document with HTML
9.1 Matching Tags
9.2 Transforming Plain Text with sed
9.3 Appending Tags
9.4 Transforming Plain Text with Perl
9.5 What You Learned in Chapter 9
9.6 Technical Notes
Chapter 10: The End of the Beginning
10.1 Learning More
10.2 Notable Tools, Implementations, and Libraries
10.3 Matching a North American Phone Number
10.4 Matching an Email Address
10.5 What You Learned in Chapter 10
Regular Expression Reference
Regular Expressions in QED
Metacharacters
Character Shorthands
Whitespace
Unicode Whitespace Characters
Control Characters
Character Properties
Script Names for Character Properties
POSIX Character Classes
Options/Modifiers
ASCII Code Chart with Regex
Technical Notes
Regular Expression Glossary
Colophon

Rezensionen

"[...] viele Bücher über diese Thematik sind doch eher etwas für Masochisten [...]. Anders die Neuerscheinung Introducing Regular Expressions aus dem O'Reilly-Verlag. Der Autor Michael Fitzgerald verspricht und bietet eine hervorragende Einführung [...] In zahlreichen Beispielen von steigender Komplexität werden nicht nur die notwendigen Grundlagen wie Pattern Matching, Alternation, Unicode und diverse Werkzeuge wie SED in verständlicher Art und Weise dargestellt. Ein gesondertes Kapitel beschäftigt sich mit dem Mark-Up von HTML-Dokumenten. Abschließend findet sich die obligatorische Referenz. Und - man mag es es angesichts dieses Themas kaum glauben - all diese Inhalte werden in lesbarer und unterhaltsamer Form dargestellt. [...] Sehr lesenswert! - macherzin.net, September 2012