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I don't really think of mutable arguments like that as "output parameters". "I/O parameters" maybe. I the sense that C like languages use output parameters where the sole job of the parameter is to return information from the function I don't see a need for output parameters in Perl, although passing references in the parameter list could be used that way.

The run time and memory cost of returning a reference to a large structure, or a list of references to large structures has essentially the same overhead on Perl as passing references back as parameters. Since returning a list of stuff is natural in Perl returning a list of references makes for easier to understand code than working with output parameters.

Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond

In reply to Re^3: Pointers and References by GrandFather
in thread Pointers and References by Leudwinus

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