Adding our @myArray allows the snippet to be used with use strict 'vars';.

{
   our @myArray;
   local *myArray = $myHash{ "tres" };
   $myArray[ 99 ] = "luftballons";
}
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Adding our @myArray allows the snippet to be used with use strict 'vars';.

Yeah, I figured that I needed the our @myArray when I added the use strict; to the program.

However, I tried the program with and without the local and it seems to work either way. Does the our @myArray remove the need for local? I've got the entire program below.

use strict;
use warnings;

my %myHash;
$myHash{"uno"} = "one";
$myHash{"dos"} = "two";
$myHash{"tres"}->[0] = "three-point-oh";
$myHash{"tres"}->[1] = "three-point-one";
$myHash{"tres"}->[2] = "three-point-two";
$myHash{"quatro"} = "four";

our @myArray;
*myArray = $myHash{"tres"};

$myArray[3] = "three-point-three";
$myArray[4] = "three-point-four";
$myArray[5] = "three-point-five";

foreach my $key (keys(%myHash)) {
    if (ref($myHash{$key}) eq "ARRAY") {
        for (my $item = 0; $item <= $#{$myHash{$key}}; $item++) {
            print qq($key->).qq([$item] = "$myHash{$key}->[$item]"\n);
        }
    } else {
        print qq($key = "$myHash{$key}"\n);
    }
}
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No, but since you've omitted the local declaration the aliasing will persist after the scope exits. The point of using local and the surrounding block is to ensure that @myArray goes back to whatever value it had before you aliased it.