정의
MongoDB\MapReduceResult::getIterator()
Returns a Traversable, which may be used to iterate through the results of the map-reduce operation.
function getIterator(): Traversable
Return Values
A Traversable, which may be used to iterate through the results of the map-reduce operation.
예시
이 예제에서는 맵 리듀스 작업의 결과를 반복합니다.
$collection = (new MongoDB\Client)->test->zips; $map = new MongoDB\BSON\Javascript('function() { emit(this.state, this.pop); }'); $reduce = new MongoDB\BSON\Javascript('function(key, values) { return Array.sum(values) }'); $out = ['inline' => 1]; $result = $collection->mapReduce($map, $reduce, $out); foreach ($result as $population) { var_dump($population); };
이 경우 출력은 다음과 유사합니다:
object(stdClass)#2293 (2) { ["_id"]=> string(2) "AK" ["value"]=> float(544698) } object(stdClass)#2300 (2) { ["_id"]=> string(2) "AL" ["value"]=> float(4040587) } object(stdClass)#2293 (2) { ["_id"]=> string(2) "AR" ["value"]=> float(2350725) } object(stdClass)#2300 (2) { ["_id"]=> string(2) "AZ" ["value"]=> float(3665228) }