Tests for the existence of an element that satisfies the given predicate.
Closure $p The predicate.:
boolean TRUE if the predicate is TRUE for at least one element, FALSE otherwise.
Overrides Collection::exists
public function exists(Closure $p) {
foreach ($this->_elements as $key => $element) {
if ($p($key, $element)) {
return true;
}
}
return false;
}