#!/usr/bin/perl

use warnings;
use strict 'refs';
use Data::Dumper;

my(@array1) = (1, 2, 3, 4);
my(@array2) = ('a', 'b', 'c', 'd', 'e', 'f');

##</code><code>##

push my @array3, @array1, @array2;

##</code><code>##

Parentheses missing around "my" list at try.pl line 12.

##</code><code>##

push (my @array3, @array1, @array2);

##</code><code>##

push (my @array3, @array1, @array2);

##</code><code>##

push my @array3, @array1, @array2;

##</code><code>##

#!/usr/bin/perl

use warnings;
use strict;              

use DBI;

my $db_host = "mysql";
my $db_port = "3306";
my $db_user = 'web-user';
my $db_pass = 'pass4monks';
my $db_name = 'order_dev';

my $dbh = DBI->connect(
    "DBI:mysql:database=$db_name;host=$db_host;port=$db_port",
    $db_user, $db_pass
) || die ("ERROR: Unable to connect to '$db_name': $DBI::errstr" );

my ($enum_qry) = $dbh->prepare(
    "SELECT column_type
       FROM information_schema.columns
      WHERE table_name = 'orders' AND column_name = 'request_status'
      LIMIT 1;"
);

$enum_qry->execute;

my $enum_ref = $enum_qry->fetchrow_hashref;

(my $enum_types = $$enum_ref{'column_type'}) =~ s/^enum\((.*)\).*/$1/;

foreach my $enum_type ( eval $enum_types ) {
    print qq[<option value="$enum_type">$enum_type</option>\n];
}

##</code><code>##

my $enum_types = "'On Order','Waiting, Pending Payment','Dispatched','Cancelled','Renewal','Amend\'ed'";
# NB: one value has a , in it and another a ' just to make this challenging... ;-)

foreach my $enum_type ( eval $enum_types ) {
    print qq[<option value="$enum_type">$enum_type</option>\n];
}

##</code><code>##

while ( $enum_types =~ m/('(.*?)'|([^']*?))($|,\s*)/g ) {
    my $match = $3 || $2;
    print qq[<option value="$match">$match</option>\n] if $match;
}

##</code><code>##

#!/usr/bin/perl

use warnings;
use strict;

my $enum_types = "'On Order','Waiting, Pending Payment','Dispatched','Cancelled','Renewal','Amen'ded'";

foreach my $enum_type ( split /(?:^'|','|'$)/, $enum_types ) {
    print qq[<option value="$enum_type">$enum_type</option>\n];
}

##</code><code>##

$ ./try.pl
<option value=""></option>
<option value="On Order">On Order</option>
<option value="Waiting, Pending Payment">Waiting, Pending Payment</option>
<option value="Dispatched">Dispatched</option>
<option value="Cancelled">Cancelled</option>
<option value="Renewal">Renewal</option>
<option value="Amen'ded">Amen'ded</option>

##</code><code>##

my $command = '/usr/local/bin/program_with_multiline_output';
chomp(my(@output) = `$command`);
my $output = join($/, grep(/./, @output));
my $returned = $? >> 8;
print "Returned: [$returned]\n";
print "Message: [$output]\n";

##</code><code>##

and all is quiet...