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In perl, if we want to get the key/value pairs of hash, you can use the following code.

use strict; use warnings; # initializing hash with three four-value pairs, among those two are h +aving inner hashes ( Numerals, Alpha ) which have three key-value pai +rs in-built my %hash = ( 'Numerals' => { '1' => 'One', '2' => 'Two', '3' => 'Three', }, 'Alpha' => { 'A' => 'Apple', 'B' => 'Ball', 'C' => 'Cat' }, 'I' => 'Roman One', 'II' => 'Roman Two' );<br/> # for getting key-value pairs of above hash foreach(keys%$hash) { # by default key stored in $_ as per above foreach statement # checks whether value of hash is another hash if(ref($hash{$_}) eq 'HASH') { # iterate the keys set of inner hash foreach my $inner_key (keys%{$hash{$_}}) { # printing key and value of inner hash print "Key:$inner_key and value:$hash{$_}{$inner_key}\n"; } } else { print "Key: $_ and Value: $hash{$_}\n" } }

In reply to Re: Iterate over a perl nested hash data structure by nvivek
in thread Iterate over a perl nested hash data structure by NewLondonPerl1

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