is it possible to combine Blocks with hashes or arrays?

It is possible to combine blocks with arrays but not with hashes, however it is easy to convert an array to a hash.

For an array you just need to separate the values with a comma:

[requirements]
array=bar,baz
hash=bar,1,baz,2
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You can then process that:

my $ary = $config{'requirements.array'};
my $hary = $config{'requirements.hash'};

# convert array reference to hash
my %hash = @$hary;

print "ARRAY:\n";
for my $item (@$ary) {
    print "$item\n";
}
print "HASH:\n";
for my $key (keys %hash) {
    print "$key => $hash{$key}\n";
}
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Output:

ARRAY:
bar
baz
HASH:
bar => 1
baz => 2
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