Question

I have an array with an array in it. It looks like:

@test =(
  'mobilephone' => ['sony', 'htc'],
  'pc' => ['dell', 'apple']
);

How can I print out the inner array?
I have ‘mobilephone’ and if the check variable is == ‘mobilephone’, so I want to print out sony and htc. How? Or is there another mistake by me?

Answer 1

@test is wrong. You are declaring a hash.

Always use use strict; use warnings; at the beginning of your script. You will be able to detect many errors!

$test{key} will give you the corresponding array reference:

#!/usr/bin/perl

use strict;
use warnings;

my %test =(
  mobilephone => ['sony', 'htc'],
  pc => ['dell', 'apple']
);

my $array = $test{mobilephone};

for my $brand (@{$array}) {
    print "$brand\n";
}

# or

for my $brand ( @{  $test{mobilephone} } ) {
    print "$brand\n";
}