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The simple name hides an incredible amount of power when handling textual data with scripting languages such as Perl, Python and awk and more and the programmer that can master regular expressions can master just about anything.
From the off it's necessary to congratulate author Jeffrey Friedl on doing a superb job of asking what can be a very complex subject and breaking it down into digestible chunks that almost anyone can understand.
From the basics of character and pattern matching through to the recognition of complex string patterns and multiple character replacements to "greedy" metacharacters and how to curb their appetite, this is about as comprehensive as it gets.
With a handful of latter chapters devoted to the differences between scripting languages and the way in which they deal with regular expressions and so many examples it'll make your eyes water there's something here for everyone.
So, if you can examine a string like this "(\\.|[^"\\])*" and know what it does and how it does it there's plenty of reference material in here for those odd moments when you need a refresher. If, however, you've no idea what the above means, and you need the ability to handle textual data, buy this book. Now! -- Dieser Text bezieht sich auf eine vergriffene oder nicht verfügbare Ausgabe dieses Titels.
Amazon.com
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5 von 5 Kunden fanden die folgende Rezension hilfreich:
4.0 von 5 Sternen
Will help you make sense of a daunting subject.,
Rezension bezieht sich auf: Mastering Regular Expressions (Nutshell Handbook) (Taschenbuch)
This is a book about Regular Expressions 'for Perl and Other Tools' but really it's a book about Perl. Other tools are covered, but coverage is a bit woolly, so if you are reading it to get the low-down on Python's RegEx capabilities etc. this book won't get you far. I can't help that feel that if the book had just concentrated on Perl, rather than giving sketchy coverage of 'Other Tools', it could have been even better (and would have definitely got five starts). That said, the extra coverage (particularly the RegEx engine material) was very interesting and has turned out invaluable in practice. If you are an absolute beginner to Perl or programming you will need another book(s) to get the most out of this one, but it is a gentle and thorough introduction that won't leave you scratching your head, which is a feat in itself considering the complexity of Regular Expressions. This is an excellent book for getting the most out of Perl's RegEx capabilities, you will close the back cover feeling that you genuinely have Mastered the subject. It is without doubt the best book available on the subject, nicely written, with a friendly and un-patronising tone (grammatical errors aside), you can't really go wrong with this one. There could have been some more useful real world examples/projects included, and the book could probably do with an overhaul (it was published in 97) to accommodate Perl 5.6 and other developments (O'Reilly are you listening?), but it is still the best out there. If RegEx is a subject you need to get to grips with, this book is the solution. Helfen Sie anderen Kunden bei der Suche nach den hilfreichsten Rezensionen
6 von 7 Kunden fanden die folgende Rezension hilfreich:
5.0 von 5 Sternen
Accelerated Learning!,
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Rezension bezieht sich auf: Mastering Regular Expressions (Nutshell Handbook) (Taschenbuch)
Within two weeks after receiving Mr. Friedl's book, I was able to write a concise Perl regex (see below) to find arbitrarily complex bible citations (e.g., Is 1:4,27:6-10,65:1-66:1,5-15) in my bible study files. I'm not a programmer by trade or hobby, have no Perl background or any appreciable experience with regexes thru grep or similar tools (my background in data modeling using EBNF helped me grasp the regex concept). Mr. Friedl's orderly and thorough progression from simple to complex material allowed me to easily tailor my reading and "practicum" towards a specific problem, while learning a great deal about regexes (and Perl as well, although this is not a Perl book). Mr. Friedl's humor helped keep my interest, although that's purely a matter of taste. I strongly recommend this book if you're looking to go from 0-60 mph on regexes, both conceptually and practically, within a couple of weeks. If you're looking for "recipes," you'll be disappointed. /$bk\s*($ver_rng+|$ch_rng+)+/g Helfen Sie anderen Kunden bei der Suche nach den hilfreichsten Rezensionen
2 von 2 Kunden fanden die folgende Rezension hilfreich:
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Masterfully written; bit of overkill for nonprogrammers,
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Rezension bezieht sich auf: Mastering Regular Expressions (Nutshell Handbook) (Taschenbuch)
Whether you are searching text documents with BBedit or flagging Usenet articles with Newswatcher, learning to use regular expressions can make your life a lot easier. Regular expressions ("regex") are text strings that allow you to search for complex variations of words and phrases. For instance, with the simple regex "gr[ea]y" you can flag any instances of the words "gray" or "grey". While a lot of applications support regex, finding out how to use this powerful function can be very difficult. There is suprisingly little online documentation of regex.Friedl's excellent book fills this void. In the introductory material, he covers what a regex is and how to use the regex language to do your own searches. The rest of the book, however, is aimed at programmers only, dealing with how various programming languages (such as Perl) implement regex. If all you want to do is use regex for searching text files or flagging Usenet articles, most of the book will not be useful to you. However, until someone comes out with a pocket manual of regex, Friedl's book is the only game in town. Helfen Sie anderen Kunden bei der Suche nach den hilfreichsten Rezensionen
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