October 2010
Intermediate to advanced
448 pages
15h 29m
English
Content preview from Perl and Apache: Your visual blueprint for developing dynamic Web contentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 8. USING PERL REFERENCES AND MODULES
Introducing References
Perl references act as pointers to information that is stored somewhere else. The idea is based upon C or C++ pointers, except that Perl maintains the structure of the referenced data in its original form.
You normally use a scalar variable to store the lowest level of a reference in the Perl code that originally initialized the reference. In fact, when a Perl module is initialized, its handle is made available as a scalar. From that scalar reference, all of the module's variables, libraries, and methods are made available to the original Perl script.
For subroutines, using a reference as a parameter makes it easier to update the data within the subroutine itself.
References are actually ...
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