my $arrayElement = $$arrayRef[0];
my $hashValue = $$hashRef{someKey};
[download]

I prefer:

my $array_element = $array_ref->[0];
my $hash_value    = $hash_ref->{some_key};
[download]

Using arrow notation makes it easier for me to recognize that the thingys in question are references (I find that the extra leading sigil gets lost in the code soup to my eyes). It also makes doing nested dereferences easier:

my $foo = $AoH_ref->[0]->{some_key};
[download]

although you'd be better off doing:

my $hash_ref = $AoH_ref->[0];
my $foo      = $hash_ref->{some_key};
[download]

in most cases.

--
The hell with paco, vote for Erudil!
:wq

  my $arrayElement = $$arrayRef[0];
  my $hashValue = $$hashRef{someKey};
[download]

  my $arrayElement = ${$arrayRef}[0];
  my $hashValue = %{$hashRef}{key};
[download]

  my $arrayElement = $arrayRef->[0];
  my $hashValue = $hashRef->{key};
[download]

The notation is what I always use - I find it easier to stick to one form throughout. Don't get me wrong I appreciate Perl's flexibility, but consistency makes my life simpler. I make no claim for superiority here! However, I do agree that the $$ notation is hard to follow, and I never use it

PS -thanks for the tip about deref'ing - I'll try it out next time.

$this = {
   _hashRef => {},
   _arrayRef => [],
};
[download]

$x = ${$this->{'_hashRef'}}->{'blowMeDown'} 
@x = reverse @{$this->{'_arrayRef'}};
[download]