Re: autovivication and referencing

[thakares]

While defining a hash, the key and value pair must be in scalar context.

In your "Scenario 2:", the value of key2 must be scalar and NOT hash. You can use a reference to a hash by replacing paranthesis by a set of curly brackets to define a reference to a hash.

my %hash=(
          key1 => value,
          key2 => {
                   param1 => val1,
                   param2 => val2
                  }
          );

Scenario 1 seems OK.

Now Autovivification:

Values:

$hash{key2}->{param1} now will be val1

It just like JSON of Javascript!