Beginning Perl 3rd Edition
Perl was originally written by Larry Wall while he was working at NASA’s Jet Propulsion Labs. Larry is an Internet legend, known not just for Perl, but as the author of the UNIX utilities rn, one of the original Usenet newsreaders, and patch, a tremendously useful tool that takes a list of differe...
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| Định dạng: | Sách |
| Ngôn ngữ: | English |
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Apress
2012
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/30787 |
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| Tóm tắt: | Perl was originally written by Larry Wall while he was working at NASA’s Jet Propulsion Labs. Larry is an
Internet legend, known not just for Perl, but as the author of the UNIX utilities rn, one of the original
Usenet newsreaders, and patch, a tremendously useful tool that takes a list of differences between two
files and allows you to turn one into the other. The term patch used for this activity is now widespread.
Perl started life as a “glue” language for Larry and his officemates, allowing one to “stick” different
tools together by converting between their various data formats. It pulled together the best features of
several languages: the powerful regular expressions from sed (the Unix stream editor), the patternscanning
language awk, and a few other languages and utilities. The syntax was further made up out of
C, Pascal, Basic, Unix shell languages, English, and maybe a few other elements along the way.
While Perl started its life as glue, it is now more often likened to another handy multiuse tool: duct
tape. A common statement heard in cyberspace is that Perl is the duct tape that holds the Internet
together.
Version 1 of Perl hit the world on December 18, 1987 and the language has been steadily evolving
since then, with contributions from a whole bunch of people (see the file AUTHORS in the latest stable
release tarball). Perl 2 expanded regular expression support, while Perl 3 enabled the language to deal
with binary data. Perl 4 was released so that the “Camel Book” (also known as Programming Perl by
Larry Wall [O'Reilly & Associates, 2000]) could refer to a new version of Perl. |
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