public function removeIf(PredicateInterface $predicate) : bool
{
$changed = false;
foreach ($this as $x) {
if ($predicate->test($x) && $this->remove($x) && !$changed) {
$changed = true;
}
}
return $changed;
}
public static final function filter(\Traversable $traversable, PredicateInterface $predicate) : \Traversable
{
$result = new \ArrayIterator();
foreach ($traversable as $value) {
if ($predicate->test($value)) {
$result->append($value);
}
}
return $result;
}
public static final function none(array $array, PredicateInterface $predicate) : bool
{
return self::all($array, $predicate->not());
}