}
if ($success) {
echo "Success:\n\n";
var_dump($result);
echo "\n";
} else {
echo "Failure...\n";
}
echo "Set Walk -> ";
$success = true;
$walk = null;
try {
$walk = function (&$elem, $key, $prefix) {
$elem = "{$prefix}: {$elem}";
};
Types\Set::walk($testSet, $walk, "Walked: ");
} catch (\Exception $e) {
$success = false;
}
if ($success) {
echo "Success:\n\n";
var_dump($testSet->getArray());
echo "\n";
} else {
echo "Failure...\n";
}
echo "Set Union -> ";
$success = true;
$result = null;
try {
$u1 = array(4, 2, 1);
