/**
* Tests whether this set is equal to the specified set.
* It is assumed that the specified set is an instance of
* the <code>SetAsBitVector</code> class.
*
* @param object ISet $set The set to compare with this set.
* @return boolean True if the sets are equal; false otherwise.
*/
public function eq(IComparable $set)
{
if ($this->getClass() != $set->getClass()) {
throw new TypeError();
}
if ($this->universeSize != $set->universeSize) {
throw new ArgumentError();
}
for ($i = 0; $i < $this->vector->getLength(); ++$i) {
if ($this->vector[$i] != $set->vector[$i]) {
return false;
}
}
return true;
}
/**
* Compares this object with the given object.
*
* @param object IComparable $object A comparable object.
* @return integer A number less than zero
* if this object is less than the given object,
* zero if this object equals the given object, and
* a number greater than zero
* if this object is greater than the given object.
*/
public function compare(IComparable $object)
{
$result = 0;
if ($this->getClass() == $object->getClass()) {
$result = $this->compareTo($object);
} else {
$result = strcmp($this->getClass()->getName(), $object->getClass()->getName());
}
return $result;
}
/**
* Tests whether this set is equal to the specified set.
* It is assumed that the specified set is an instance of
* the SetAsArray class.
*
* @param object ISet $set The set to compare with this set.
* @return boolean True if the sets are equal; false otherwise.
*/
public function eq(IComparable $set)
{
if ($this->getClass() != $set->getClass()) {
throw new TypeError();
}
if ($this->universeSize != $set->universeSize) {
throw new ArgumentError();
}
for ($item = 0; $item < $this->universeSize; ++$item) {
if ($this->array[$item] != $set->array[$item]) {
return false;
}
}
return true;
}
/**
* Tests whether this multiset is equal to the specified multiset.
* It is assumed that the specified multiset is an instance of
* the MultisetAsLinkedList class.
*
* @param IMultiset $multiset The multiset to compare with this multiset.
* @return boolean True if the multisets are equal; false otherwise.
*/
public function eq(IComparable $set)
{
if ($this->getClass() != $set->getClass()) {
throw new TypeError();
}
if ($this->universeSize != $set->universeSize) {
throw new ArgumentError();
}
$p = $this->list->getHead();
$q = $set->list->getHead();
while ($p !== NULL && $q !== NULL) {
if (ne($p->getDatum(), $q->getDatum())) {
return false;
}
$p = $p->getNext();
$q = $q->getNext();
}
if ($p !== NULL || $q !== NULL) {
return false;
} else {
return true;
}
}
