|Regular Expr. Cookbook|
|Teach Yourself Reg. Expr.|
|Mastering Regular Expr.|
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|Regular Expr. Pocket Ref.|
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|Regex Recipes for Windows|
|Regular Expressions Quick Start|
|Regular Expressions Tutorial|
|Replacement Strings Tutorial|
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|Regular Expressions Examples|
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The first 10 pages of the book describe the various tokens or syntactic elements you can use in regular expression, along with a paragraph of explanation for each of them. It’s a useful refresher if you haven’t used regular expressions in a while, but don’t expect to really learn anything you didn’t know before.
The rest of the book covers the languages one by one, devoting about 10 pages to each. First there’s a table with the regex tokens supported by the language, and a one-line description of what the token does. Then the author describes the functions, classes and commands available in the tool or language. Each function or property has a one-line or one-paragraph description. There’s probably less information here than you can get by pressing F1 in your development tool. For each language there’s also a section describing its Unicode support (or lack thereof). This is quite useful, as Unicode support is one of the areas where modern regex flavors differ greatly.
There are very few examples in this book. It really is a quick reference. The author makes no attempt to teach you something you don’t already know. If you prefer to have your reference information on your desk rather than on your screen, this book certainly delivers. If not, you’ll probably find the help file that comes with your development tool or an online regular expression reference handier.
Personally, I believe O’Reilly should have split up this book into 8 volumes of similar size, one for each of the 7 major programming languages, and another for the UNIX shell tools described in this pocket reference. The separate volumes could then discuss the regex flavor of each language in greater detail, allowing the book to be used as a (quick) tutorial as well as a reference. Though you’d have to buy multiple books if you work with multiple languages, you’d get 8 times the information for each, which would very likely be all you need to comfortably use regular expressions. In fact, this is exactly what O’Reilly achieved with their excellent book Oracle Regular Expressions Pocket Reference for Oracle Database 10g.
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