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There's a couple of options. You can use the aliasing behavior of @_, or you can pass an actual reference.

sub func_alias { $_[0] = 5; } sub func_ref { my $ref = shift; $$ref = 5; } my $x; func_alias($x); print "x = $x\n"; my $y; func_ref(\$y); print "y = $y\n";

The latter is probably better, as it is less likely to cause surprise the caller (ie, it's more explicit that you're potentially modifying the function parameter).

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In reply to Re: How to pass by reference by bbfu
in thread How to pass by reference by tanyeun

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