<ul data-eligibleForWebStory="true"><li>Perl subroutine prototypes enforce a certain structure on subroutine arguments to catch errors early and enhance code readability.</li><li>Prototypes specify the expected number and types of arguments, placed immediately after the subroutine name.</li><li>Common Perl subroutine prototype symbols include '$', '@', '%', '&', '*', '[]', '[', ';', and '[$@%&*]'.</li><li>A practical example is shown with the creation of a new functional Perl module Stats::Basic for basic statistics calculations.</li><li>Functions like min, max, mean, and median are implemented using subroutine prototypes for argument validation.</li><li>Implementations include prototypes like &@ for a code reference and list of numbers, used for functions like min and max.</li><li>The usage of map, sort, and custom logic in functions like min, max, sum, and mean are demonstrated within the module.</li><li>Exporting functions from the module without namespace is achieved using Exporter in Perl.</li><li>The article showcases the power of Perl subroutine prototypes in creating robust and readable code.</li><li>It concludes with the potential for enhancing Perl capabilities through operator overloading in custom objects.</li></ul>

Learning Perl - Prototypes

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