正則表達(dá)式Cookbook

前言

Over the past decade, regular expressions have experienced a remarkable rise in popularity. Today, all the popular programming languages include a powerful regular expression library, or even have regular expression support built right into the language. Many developers have taken advantage of these regular expression features to provide the users of their applications the ability to search or filter through their data using a regular expression. Regular expressions are everywhere. Many books have been published to ride the wave of regular expression adoption. Most do a good job of explaining the regular expression syntax along with some examples and a reference. But there aren't any books that present solutions based on regular expressions to a wide range of real-world practical problems dealing with text on a computer and in a range of Intemet applications. We, Steve and Jan, decided to fill that need with this book. We particularly wanted to show how you can use regular expressions in situations where people with limited regular expression experience would say it can't be done, or where software purists would say a regular expression isn't the right tool for the job. Because regular expressions are everywhere these days, they are often a readily available tool that can be used by end users, without the need to involve a team of programmers. Even programmers can often save time by using a few regular expressions for information retrieval and alteration tasks that would take hours or days to code in procedural code, or that would otherwise require a third-party library that needs prior review and management approval. Caught in the Snarls of Different Versions As with anything that becomes popular in the IT industry, regular expressions come in many different implementations, with varying degrees of compatibility. This has resulted in many different regular expression flavors that don't always act the same way, or work at all, on a particular regular expression.

內(nèi)容概要

本書提供了超過100條的錦囊妙計(jì)，幫助你利用正則表達(dá)式處理數(shù)據(jù)、操縱文本。每位程序員都能找到正則表達(dá)式的用武之地，但想要充分發(fā)揮它的威力卻未必容易。縱使經(jīng)驗(yàn)豐富的用戶也常會(huì)遇到性能不佳、誤判、漏判或者令人費(fèi)解的錯(cuò)誤?！墩齽t表達(dá)式Cookbook》對涉及此工具的最常見任務(wù)做了逐步講解，此外還包括在C#、JaVa、JavaScipt、Perl、PHP、Python、Ruby和VB.NET語言中使用正則表達(dá)式的訣竅。    閱讀本書，你將：    ·通過簡潔的教程理解正則表達(dá)式的基本原理    ·在多種編程和腳本語言中高效地應(yīng)用正則表達(dá)式    ·學(xué)習(xí)如何驗(yàn)證和格式化輸入    ·操縱單詞、行、特殊字符和數(shù)值    ·找到在URL、路徑、標(biāo)記和數(shù)據(jù)交換中使用正則表達(dá)式的方法    ·學(xué)習(xí)更高級(jí)的正則表達(dá)式特性    ·理解在不同語言中正則表達(dá)式的應(yīng)用程序接口、語法和行為的不同    ·針對特定需要，編寫更加優(yōu)化的正則表達(dá)式    無論你是初學(xué)者還是經(jīng)驗(yàn)豐富的用戶，《正則表達(dá)式Cookbook》都將有助于你對這一獨(dú)特而不可替代的工具的理解。你將學(xué)到功能強(qiáng)大的新技巧，避免和語言相關(guān)的陷阱，利用這一經(jīng)過實(shí)踐檢驗(yàn)的方法解決現(xiàn)實(shí)世界中的難題，從而節(jié)省寶貴的時(shí)間。

作者簡介

Jan Goyvaerts，經(jīng)營Just Great Software 軟件公司，在這家公司他負(fù)責(zé)設(shè)計(jì)和開發(fā)一些最流行的正則表達(dá)式軟件。Steven Levithan，是一位JavaScript正則表達(dá)式權(quán)威專家，同時(shí)他還負(fù)責(zé)一個(gè)以正則表達(dá)式內(nèi)容為中心的流行博客。

書籍目錄

Preface.1. Introduction to Regular Expressions　Regular Expressions Defined　Searching and Replacing with Regular Expressions　Tools for Working with Regular Expressions2. Basic Regular Expression Skills　2.1 Match Literal Text　2.2 Match Nonprintable Characters　2.3 Match One of Many Characters　2.4 Match Any Character　2.5 Match Something at the Start and/or the End of a Line　2.6 Match Whole Words　2.7 Unicode Code Points, Properties, Blocks, and Scripts　2.8 Match One of Several Alternatives　2.9 Group and Capture Parts of the Match　2.10 Match Previously Matched Text Again　2.11 Capture and Name Parts of the Match　2.12 Repeat Part of the Regex a Certain Number of Times　2.13 Choose Minimal or Maximal Repetition　2.14 Eliminate Needless Backtracking　2.15 Prevent Runaway Repetition　2.16 Test for a Match Without Adding It to the Overall Match　2.17 Match One of Two Alternatives Based on a Condition　2.18 Add Comments to a Regular Expression　2.19 Insert Literal Text into the Replacement Text　2.20 Insert the Regex Match into the Replacement Text　2.21 Insert Part of the Regex Match into the Replacement Text　2.22 Insert Match Context into the Replacement Text3. Programming with Regular Expressions　Programming Languages and Regex Flavors　3.1 Literal Regular Expressions in Source Code　3.2 Import the Regular Expression Library　3.3 Creating Regular Expression Objects　3.4 Setting Regular Expression Options　3.5 Test Whether a Match Can Be Found Within a Subject String　3.6 Test Whether a Regex Matches the Subject String Entirely　3.7 Retrieve the Matched Text　3.8 Determine the Position and Length of the Match　3.9 Retrieve Part of the Matched Text　3.10 Retrieve a List of All Matches　3.11 Iterate over All Matches　3.12 Validate Matches in Procedural Code　3.13 Find a Match Within Another Match　3.14 Replace All Matches　3.15 Replace Matches Reusing Parts of the Match　3.16 Replace Matches with Replacements Generated in Code　3.17 Replace All Matches Within the Matches of Another Regex　3.18 Replace All Matches Between the Matches of Another Regex　3.19 Split a String　3.20 Split a String, Keeping the Regex Matches　3.21 Search Line by Line4. Validation and Formatting　4.1 Validate Email Addresses　4.2 Validate and Format North American Phone Numbers　4.3 Validate International Phone Numbers　4.4 Validate Traditional Date Formats　4.5 Accurately Validate Traditional Date Formats　4.6 Validate Traditional Time Formats　4.7 Validate ISO 8601 Dates and Times　4.8 Limit Input to Alphanumeric Characters　4.9 Limit the Length of Text　4.10 Limit the Number of Lines in Text　4.11 Validate Affirmative Responses　4.12 Validate Social Security Numbers　4.13 Validate ISBNs　4.14 Validate ZIP Codes　4.15 Validate Canadian Postal Codes　4.16 Validate U.K. Postcodes　4.17 Find Addresses with Post Office Boxes　4.18 Reformat Names From "FirstName LastName" to "LastName, FirstName"　4.19 Validate Credit Card Numbers　4.20 European VAT Numbers5. Words, Lines, and Special Characters　5.1 Find a Specific Word　5.2 Find Any of Multiple Words　5.3 Find Similar Words　5.4 Find All Except a Specific Word　5.5 Find Any Word Not Followed by a Specific Word　5.6 Find Any Word Not Preceded by a Specific Word　5.7 Find Words Near Each Other　5.8 Find Repeated Words　5.9 Remove Duplicate Lines　5.10 Match Complete Lines That Contain a Word　5.11 Match Complete Lines That Do Not Contain a Word　5.12 Trim Leading and Trailing Whitespace　5.13 Replace Repeated Whitespace with a Single Space　5.14 Escape Regular Expression Metacharacters6. Numbers　6.1 Integer Numbers　6.2 Hexadecimal Numbers　6.3 Binary Numbers　6.4 Strip Leading Zeros　6.5 Numbers Within a Certain Range　6.6 Hexadecimal Numbers Within a Certain Range　6.7 Floating Point Numbers　6.8 Numbers with Thousand Separators　6.9 Roman Numerals7. URLs, Paths, and Internet Addresses　7.1 Validating URLs　7.2 Finding URLs Within Full Text　7.3 Finding Quoted URLs in Full Text　7.4 Finding URLs with Parentheses in Full Text　7.5 Turn URLs into Links　7.6 Validating URNs　7.7 Validating Generic URLs　7.8 Extracting the Scheme from a URL　7.9 Extracting the User from a URL　7.10 Extracting the Host from a URL　7.11 Extracting the Port from a URL　7.12 Extracting the Path from a URL　7.13 Extracting the Query from a URL　7.14 Extracting the Fragment from a URL　7.15 Validating Domain Names　7.16 Matching IPv4 Addresses　7.17 Matching IPv6 Addresses　7.18 Validate Windows Paths　7.19 Split Windows Paths into Their Parts　7.20 Extract the Drive Letter from a Windows Path　7.21 Extract the Server and Share from a UNC Path　7.22 Extract the Folder from a Windows Path　7.23 Extract the Filename from a Windows Path　7.24 Extract the File Extension from a Windows Path　7.25 Strip Invalid Characters from Filenames8. Markup and Data Interchange　8.1 Find XML-Style Tags　8.2 Replace Tags with 　8.3 Remove All XML-Style Tags Except and 　8.4 Match XML Names　8.5 Convert Plain Text to HTML by Adding

章節(jié)摘錄

插圖：At the time ot this writing, the Win32 version of Delphi does not have any built- in support for regular expressions. There are many VCL components available that provide regular expression support. I recommend that you choose one based on PCRE. Delphi has the ability to link C object files into your applications, and many VCL wrappers for PCRE use such object files. This allows you to keep your application as a single .exe file.  You can download my own TPerlRegEx component at http://www.regexp.info/del phi.htrnl. This is a VCL component that installs itself onto the component palette, so you can easily drop it into a form. Another popular PCRE wrapper for Delphi is the TJclRegEx class part of the 3CL library at http://www.delphi-jedi.org. TJclRegEx descends from TObject, so you can't drop it into a form. Both libraries are open source under the Mozilla Public License.

媒體關(guān)注與評論

“這是一本精心打造的著作，內(nèi)容翔實(shí)。我僅僅讀了介紹的章節(jié)就學(xué)會(huì)了一些新技巧?！?　　——Nikolaj Lindberg，計(jì)算機(jī)語言學(xué)家，STTS Speech Technology Services “《正則表達(dá)式Cookbook》對當(dāng)前面臨的問題做出了優(yōu)雅的解答。總之，我對這些技巧之詳盡感到震驚?！?　　——Zak Greant，開放技術(shù)倡導(dǎo)者和戰(zhàn)略家

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《正則表達(dá)式Cookbook(影印版)》由東南大學(xué)出版社出版。

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