How do I pass a hash to a function in Perl?

Question

I have a function that takes a variable and an associative array, but I can\'t seem to get them to pass right. I think this has something to do with function declarations, h

Answer 1

Arguments to functions get flattened into a single array (@_). So it's usually easiest to pass hashes to function by reference.

To create a HASH:

my %myhash = ( key1 => "val1", key2 => "val2" );

To create a reference to that HASH:

my $href = \%myhash

To access that hash by reference;

%$href

So in your sub:

my $myhref = shift;

keys %$myhref;