$config = {
  verbosity => 3,
  logger    => 12,
};

##</code><code>##

# Create a hash
my %myhash = ( 'verbosity', 3, 'logger', 12 );

# Assign it to a hashref
my $myhashref = \%myhash;

# To get the same result
# without the hash variable
my $myhashref = {
  verbosity => 3,
  logger    => 12,
};