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Answer: Is it possible to do pass by reference in Perl?

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Q&A > subroutines > Is it possible to do pass by reference in Perl? contributed by tilly

In addition to the answers above it is possible to pass arrays and hashes by reference without using a \. The way to do this is to define a function with a prototype as explained in perlsub.

For a more complete explanation I can recommend FMTYEWTK About Prototypes, which says in detail what they are, where they are buggy, and the various design flaws that make them something to avoid on the whole.

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