Laravel是一种流行的PHP开发框架,它提供了丰富的功能和工具,用于快速构建高质量的Web应用程序。在Laravel中,集合(Collection)是一种强大的数据结构,它允许我们对数组进行各种操作和转换。 groupBy()是Laravel集合中的一个方法,它允许我们根据指定的键对集合进行分组。在分组过程中,相同键的元素将被放置在同一个子集合...
Laravel Collection是Laravel框架中的一个强大的数据处理工具,它提供了丰富的方法来对集合进行操作和转换。在Laravel Collection中,groupBy()方法用于根据指定的键对集合进行分组。但是,有时候我们可能需要对集合进行分组后,再移除分组的结构,即移除groupBy()之后的集合分组。 为了移除groupBy()之后的集合分组,我们...
$result = $collection->groupBy('arrival_date') ->map(function ($row) { $firstRow = $row->first(); return [ 'arrival_date' => $firstRow['arrival_date'], 'total_amount' => $row->sum('total_amount'), 'total_traveller' => $firstRow['total_traveller'], ]; })->values() ->a...
If you eager-loaddescription, then you can group the resulting collection by the nested object of the collection. So you may have: $expenses=Expenses::with('description')->get();//collection Then group it: $grouped=$expenses->groupBy('description.name');//or$grouped=$expenses->groupBy('de...
->groupBy('specification_key'); // group by collection array:1 [ "RAM" => array:2 [ 0 => array:6 [ "id" => 1 "product_id" => 1 "specification_key" => "RAM" "specification_value" => "16 GB" "created_at" => "2021-03-21T15:35:21.000000Z" ...
$collection = collect([1, 2, 3, 4]); $collection->count(); // 4countBy()The countBy method counts the occurrences of values in the collection. By default, the method counts the occurrences of every element:$collection = collect([1, 2, 2, 2, 3]); $counted = $collection->count...
$collection = collect([['John Doe', 35], ['Jane Doe', 33]]); $collection->eachSpread(function ($name, $age) { // });You may stop iterating through the items by returning false from the callback:$collection->eachSpread(function ($name, $age) { return false; });...
->orderBy($column, 'asc') ->take($perPage); } protected function removeExistingOrdersFor($column) { return Collection::make($this->orders) ->reject(function ($order) use ($column) { return isset($order['column']) ? $order['column'] === $column : false; ...
* @property-read \Illuminate\Database\Eloquent\Collection|\App\Product[] $products * @method static \Illuminate\Database\Query\Builder|\App\Shop whereId($value) * @method static \Illuminate\Database\Query\Builder|\App\Shop whereName($value) ...
App\User::first(['name']);=> App\User {#704name: "cnwedd",}//注意这个操作会执行数据库查询,并且只获取name字段 我们也可以使用laravel的collection support helper类来使得任意数组变成一个方便操作的collection: myusers=newIlluminate\Support\Collection(myusers...