Re: Print values and keys from hash of hashes.

The following hash creation isn't doing what you think it is. It's creating a hash with a hash reference as its only key, and with no value (value is assigned as undef).

my %hash = {
          'debt-1' => {
                            'debt_id' => 10,
                            'mobile' => 11,
                            'address1' => 12
                        },
          'dedt-2' => {
                            'debt_id' => 20,
                            'mobile' => 21,
                            'address1' => 22
                        },
        };
[download]

Instead of using braces (ie. {}) to create the hash which is used to create a hash reference to an anonymous hash, you need to use parens instead:

my %hash = (
          'debt-1' => {
                            'debt_id' => 10,
                            'mobile' => 11,
                            'address1' => 12
                        },
          'dedt-2' => {
                            'debt_id' => 20,
                            'mobile' => 21,
                            'address1' => 22
                        },
        );
[download]

Things should begin to fall into place after you've fixed that.

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Re^2: Print values and keys from hash of hashes. by gurung (Sexton) on Feb 07, 2020 at 00:22 UTC
Like stevo said, it is also mentioned in perlreftut (Make rule 2) `If you write just "[]", you get a new, empty anonymous array. If you write just "{}", you get a new, empty anonymous hash. my %hash = ( 'debt-1' => { 'debt_id' => 10, 'mobile' => 11, 'address1' => 12 }, ); my $hash_ref = { 'debt-1' => { 'debt_id' => 10, 'mobile' => 11, 'address1' => 12 }, };` [download]	[reply] [d/l]

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Re^2: Print values and keys from hash of hashes.
by gurung (Sexton) on Feb 07, 2020 at 00:22 UTC

If you write just "[]", you get a new, empty anonymous array.
If you write just "{}", you get a new, empty anonymous hash.

my %hash =
(
      'debt-1' => {
                            'debt_id' => 10,
                            'mobile' => 11,
                            'address1' => 12
                        },
);

my $hash_ref =
{
      'debt-1' => {
                            'debt_id' => 10,
                            'mobile' => 11,
                            'address1' => 12
                        },
};
[download]

[reply]
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