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Passing a reference is just passing a point, not the whole array or object. It is quicker, cheaper (using less memory), and safer (you do not need to keep two or more copies of the same data).
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Passing a reference is just passing a point, not the whole array or object. It is quicker, cheaper (using less memory), and safer (you do not need to keep two or more copies of the same data).

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when should i pass by reference?<br />
($r, @d) = DBQuery(\%dbinfo, $sql);<br />
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what is the advantage of it?
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when should i pass by reference?
($r, @d) = DBQuery(\%dbinfo, $sql);

what is the advantage of it?

reference

Perl is a high-level, general-purpose, interpreted, dynamic programming languages with over 25 years of development. Perl 5 runs on over 100 platforms from portables to mainframes and is suitable for both rapid prototyping and large-scale development projects.  Perl gained widespread popularity as a Common Gateway Interface (CGI) scripting language, in part due to its regular expression and string parsing abilities. In addition to CGI, Perl is used for graphics programming, system administration, network programming, finance, bioinformatics, and other applications.