HASH OF HASH

Question 1

DECLARE HASH OF HASH

Answer 1

%hash = (
‘key’ => { ‘sub_key’ => ‘value}, …);

Question 2

LOOP THROUGH HASH OF HASH

Answer 2

for my $i (sort(keys %hash)) {
print $i;
for my $j (sort(keys %hash{$i})) {
print “$j:” %hash{$i}{$j};
}
}

Question 3

CHECK INDIVIDUAL VALUE OF HASH OF HASH

Answer 3

$value = $hash{‘key’}{‘subkey’};

Question 4

CHECK INDIVIDUAL VALUE OF HASH OF HASH

Answer 4

$value = $hash{‘key’}{‘subkey’};

Question 5

ADD KEY VALUE PAIR

Answer 5

$hash{‘key’}{‘newksubkey’} = ‘newvalue’;

Question 6

DELETE SUBKEY

Answer 6

delete $hash{‘key’}{‘subkey’};

Question 7

UPDATE VALUE

Answer 7

$hash{‘key’}{‘subkeytobeupdated’} = ‘updatedvalue’;

Question 8

IF EXISTS KEY

Answer 8

if (exists $hash{‘key’}){
#statement
}

Question 9

IF EXISTS SUBKEY

Answer 9

if (exists $hash{‘key’}{‘subkey’}){
#statement
}