Christiansen T. et al. Programming Perl: Unmatched power for text processing and scripting

4th ed. - Cambridge: O’Reilly Media, 2012. - 1175 p.
ISBN: 0596004923, 9780596004927Adopted as the undisputed Perl bible soon after the first edition appeared in 1991, Programming Perl is still the go-to guide for this highly practical language. Perl began life as a super-fueled text processing utility, but quickly evolved into a general purpose programming language that’s helped hundreds of thousands of programmers, system administrators, and enthusiasts, like you, get your job done.
In this much-anticipated update to "the Camel," three renowned Perl authors cover the language up to its current version, Perl 5.14, with a preview of features in the upcoming
5.16. In a world where Unicode is increasingly essential for text processing, Perl offers the best and least painful support of any major language, smoothly integrating Unicode everywhere—including in Perl’s most popular feature: regular expressions.
Important features covered by this update include:
New keywords and syntax
I/O layers and encodings
New backslash escapes
Unicode 6.0
Unicode grapheme clusters and properties
Named captures in regexes
Recursive and grammatical patterns
Expanded coverage of CPAN
Current best practices