/**
* Вычитает подмножество
*
* @param SimpleRangeSetInterface $set
*/
public function subtractSet(SimpleRangeSetInterface $set)
{
$result = array();
$length = count($this->sets);
for ($key = 0; $key < $length; $key++) {
$existingSet = $this->sets[$key];
if ($existingSet instanceof SimpleRangeSet) {
if ($existingSet->intersect($set)) {
$result = array_merge($result, $existingSet->subtract($set));
$this->sets->remove($key);
$key--;
$length = count($this->sets);
}
}
}
$this->sets->merge($result);
}