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It's also a good language for many system management tasks. The language is intended to be practical (easy to use, efficient, complete) rather than beautiful (tiny, elegant, minimal).</p> <p>Perl combines (in the author's opinion, anyway) some of the best features of C, <b>sed</b>, <b>awk</b>, and <b>sh</b>, so people familiar with those languages should have little difficulty with it. (Language historians will also note some vestiges of <b>csh</b>, Pascal, and even BASIC-PLUS.) Expression syntax corresponds closely to C expression syntax. Unlike most Unix utilities, Perl does not arbitrarily limit the size of your data--if you've got the memory, Perl can slurp in your whole file as a single string. Recursion is of unlimited depth. And the tables used by hashes (sometimes called "associative arrays") grow as necessary to prevent degraded performance. Perl can use sophisticated pattern matching techniques to scan large amounts of data quickly. Although optimized for scanning text, Perl can also deal with binary data, and can make dbm files look like hashes. Setuid Perl scripts are safer than C programs through a dataflow tracing mechanism that prevents many stupid security holes.</p> <p>If you have a problem that would ordinarily use <b>sed</b> or <b>awk</b> or <b>sh</b>, but it exceeds their capabilities or must run a little faster, and you don't want to write the silly thing in C, then Perl may be for you. There are also translators to turn your <b>sed</b> and <b>awk</b> scripts into Perl scripts.</p> <p>But wait, there's more...</p> <p>Begun in 1993 (see <a href="/5.8.4/perlhist">perlhist</a>), Perl version 5 is nearly a complete rewrite that provides the following additional benefits:</p> <ul> <li><p>modularity and reusability using innumerable modules</p> <p>Described in <a href="/5.8.4/perlmod">perlmod</a>, <a href="/5.8.4/perlmodlib">perlmodlib</a>, and <a href="/5.8.4/perlmodinstall">perlmodinstall</a>.</p> </li> <li><p>embeddable and extensible</p> <p>Described in <a href="/5.8.4/perlembed">perlembed</a>, <a href="/5.8.4/perlxstut">perlxstut</a>, <a href="/5.8.4/perlxs">perlxs</a>, <a href="/5.8.4/perlcall">perlcall</a>, <a href="/5.8.4/perlguts">perlguts</a>, and <a href="/5.8.4/xsubpp">xsubpp</a>.</p> </li> <li><p>roll-your-own magic variables (including multiple simultaneous DBM implementations)</p> <p>Described in <a href="/5.8.4/perltie">perltie</a> and <a href="/5.8.4/AnyDBM_File">AnyDBM_File</a>.</p> </li> <li><p>subroutines can now be overridden, autoloaded, and prototyped</p> <p>Described in <a href="/5.8.4/perlsub">perlsub</a>.</p> </li> <li><p>arbitrarily nested data structures and anonymous functions</p> <p>Described in <a href="/5.8.4/perlreftut">perlreftut</a>, <a href="/5.8.4/perlref">perlref</a>, <a href="/5.8.4/perldsc">perldsc</a>, and <a href="/5.8.4/perllol">perllol</a>.</p> </li> <li><p>object-oriented programming</p> <p>Described in <a href="/5.8.4/perlobj">perlobj</a>, <a href="/5.8.4/perlboot">perlboot</a>, <a href="/5.8.4/perltoot">perltoot</a>, <a href="/5.8.4/perltooc">perltooc</a>, and <a href="/5.8.4/perlbot">perlbot</a>.</p> </li> <li><p>support for light-weight processes (threads)</p> <p>Described in <a href="/5.8.4/perlthrtut">perlthrtut</a> and <a href="/5.8.4/threads">threads</a>.</p> </li> <li><p>support for Unicode, internationalization, and localization</p> <p>Described in <a href="/5.8.4/perluniintro">perluniintro</a>, <a href="/5.8.4/perllocale">perllocale</a> and <a href="/5.8.4/Locale::Maketext">Locale::Maketext</a>.</p> </li> <li><p>lexical scoping</p> <p>Described in <a href="/5.8.4/perlsub">perlsub</a>.</p> </li> <li><p>regular expression enhancements</p> <p>Described in <a href="/5.8.4/perlre">perlre</a>, with additional examples in <a href="/5.8.4/perlop">perlop</a>.</p> </li> <li><p>enhanced debugger and interactive Perl environment, with integrated editor support</p> <p>Described in <a href="/5.8.4/perldebtut">perldebtut</a>, <a href="/5.8.4/perldebug">perldebug</a> and <a href="/5.8.4/perldebguts">perldebguts</a>.</p> </li> <li><p>POSIX 1003.1 compliant library</p> <p>Described in <a href="/5.8.4/POSIX">POSIX</a>.</p> </li> </ul> <p>Okay, that's <i>definitely</i> enough hype.</p> </div> <div id="footer"> <p>Perldoc Browser is maintained by Dan Book (<a href="https://metacpan.org/author/DBOOK">DBOOK</a>). Please contact him via the <a href="https://github.com/Grinnz/perldoc-browser/issues">GitHub issue tracker</a> or <a href="mailto:dbook@cpan.org">email</a> regarding any issues with the site itself, search, or rendering of documentation.</p> <p>The Perl documentation is maintained by the Perl 5 Porters in the development of Perl. Please contact them via the <a href="https://github.com/Perl/perl5/issues">Perl issue tracker</a>, the <a href="https://lists.perl.org/list/perl5-porters.html">mailing list</a>, or <a href="https://kiwiirc.com/client/irc.perl.org/p5p">IRC</a> to report any issues with the contents or format of the documentation.</p> </div> </div> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.slim.min.js" integrity="sha512-/DXTXr6nQodMUiq+IUJYCt2PPOUjrHJ9wFrqpJ3XkgPNOZVfMok7cRw6CSxyCQxXn6ozlESsSh1/sMCTF1rL/g==" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.1/umd/popper.min.js" integrity="sha512-ubuT8Z88WxezgSqf3RLuNi5lmjstiJcyezx34yIU2gAHonIi27Na7atqzUZCOoY4CExaoFumzOsFQ2Ch+I/HCw==" crossorigin="anonymous"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script> <script src="/highlight.pack.js"></script> <script>hljs.highlightAll();</script> </body> </html>