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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 btrott

... And, as would follow from chromatic's answer, if you modify the references within a subroutine, you'll also modify the values those references point to, outside the subroutine.
my $str = "foo"; print $str, "\n"; change(\$str); print $str, "\n"; sub change { my $ref = shift; $$ref = "bar"; }

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