Straight from https://perldoc.perl.org/perlref.html
I don't understand below
$$hashref{"KEY"} = "VALUE"; # CASE 0
${$hashref}{"KEY"} = "VALUE"; # CASE 1
${$hashref{"KEY"}} = "VALUE"; # CASE 2
${$hashref->{"KEY"}} = "VALUE"; # CASE 3
What is the difference between case 1 and 2?
I am thinking anything inside ${} is a pointer to some address so it's like
my $hashref = \%hash;
${$hashref}{"KEY"} is really $$hashref{"KEY"} and this is dereferencing \%hash and looking up it's "KEY"
${$hashref->{"KEY"}} .. I would think is.. ?? I thought the rule was the bind closest to the left so I thought this also became $$hashref->{"KEY"}. which is same as ${$hashref}{'KEY'}. Am I getting this wrong?