- EXAMPLES -


# Create some sets. Parameters are label and universe (both optional).

$set1 = new Set("Guy's names", "People");
$set1->add(array("Pat", "Lauren", "Matt", "Joe", "Billy"));

$set2 = new Set("Girl's names", "People");
$set2->add(array("Christy", "Pat", "Lauren", "Joe", "Kelly", "Tamara"));

$set3 = new Set("Celebs", "People");
$set3->add("Christy", "Kelly", "Matt", "Joe", "Brad", "Miley");

$set4 = new Set("Positive #s", "Rational #s");
$set4->add(range(1, 10));

$set5 = new Set("Copy", "Rational #s");
$set5->add($set4)->add(11, 12, 13, 14, 15);

# Perform set operations. All set operations return a 'result' set except isSubset() and isSuperset().

$resultSet = $set1->union($set2, $set3);

echo $resultSet->getLabel();
var_dump($resultSet->get());

$resultSet = $set1->symDiff($set2, $set3);

echo $resultSet->getLabel();
var_dump($resultSet->get());

$resultSet = $set1->relComp($set2, $set3);

echo $resultSet->getLabel();
var_dump($resultSet->get());

$resultSet = $set1->intersection($set2, $set3);

echo $resultSet;
var_dump($resultSet->get());

echo $set4->isSubset($set5);
echo $set5->isSuperset($set4);

# The following will throw a 'Set_Exception' exception because the two sets do not belong to the same universe

$resultSet = $set1->union($set4);