groupByKey() публичный статический Метод

Group array by key
public static groupByKey ( array $arrayList, string $key = 'id' ) : array
$arrayList array
$key string
Результат array
Документация по классу Arr
Пример #1
0
 public function testGroupByKey()
 {
     $array = array(array('name' => 'Bob', 'age' => 37), array('name' => 'Bob', 'age' => 66), array('name' => 'Fred', 'age' => 20), array('age' => 41));
     isSame(array('Bob' => array(array('name' => 'Bob', 'age' => 37), array('name' => 'Bob', 'age' => 66)), 'Fred' => array(array('name' => 'Fred', 'age' => 20))), Arr::groupByKey($array, 'name'));
     $array = array((object) array('name' => 'Bob', 'age' => 37), (object) array('name' => 'Bob', 'age' => 66), (object) array('name' => 'Fred', 'age' => 20), (object) array('age' => 41));
     is(array('Bob' => array((object) array('name' => 'Bob', 'age' => 37), (object) array('name' => 'Bob', 'age' => 66)), 'Fred' => array((object) array('name' => 'Fred', 'age' => 20))), Arr::groupByKey($array, 'name'));
 }