Author: Jeffrey E. F. Friedl

WWW book information:

• First edition: http://www.oreilly.com/catalog/regex/
• Second edition: http://www.oreilly.com/catalog/regex2/
• Third edition: http://www.oreilly.com/catalog/regex3/

More book information: http://enterprise.ic.gc.ca/~jfriedl/regex/ (found broken, 28 Feb 2008)

Author's Web site: http://regex.info/

This book explains regular expressions in general, and then covers a number of different tools explaining specialized variations. The book focuses more on Perl, but Tcl is one of the tools covered in its own special section. And more...

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The second edition praises Tcl's regular expression engine: Henry's Tcl regex engine is an important step forward.

Also, in Chapter 6: Crafting an Efficient Expression, Friedl says: Most of what this chapter talks about simply does not apply to Tcl. And, as the sidebar explains, Henry Spencer's Tcl regex is a hybrid DFA/NFA engine and it doesn't need most of the optimizations described in the chapter.

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