Laravel 7：在集合中查找重复项并保留较低的值并删除其他较高的值
Laravel 7: Find duplicates in a collection and keep lower values and remove the others higher values
当我使用
$data_collect->groupBy('group_id')
然后给我这样的结果：
Illuminate\Support\Collection Object (
[items:protected] => Array
(
[1] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 1
[title] => Item A
[group_id] => 1
[price] => 4000
)
[1] => stdClass Object
(
[id] => 22
[title] => Gru gru
[group_id] => 1
[price] => 3000
)
)
)
[7] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 2
[title] => Item B
[group_id] => 7
[price] => 0
)
)
)
[4] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 11
[title] => Item X
[group_id] => 4
[price] => 3000
)
)
)
[6] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 12
[title] => My Book
[group_id] => 6
[price] => 3000
)
)
)
[2] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 13
[title] => Item 1A
[group_id] => 2
[price] => 3000
)
[1] => stdClass Object
(
[id] => 20
[title] => Item 1B
[group_id] => 2
[price] => 3000
)
)
)
[3] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 14
[title] => Bla bla
[group_id] => 3
[price] => 0
)
)
)
) )
但我想过滤掉重复数据以保持 lower "price" 值和 remove 更高的“price”值。所以结果将是这样的：
Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[1] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[1] => stdClass Object
(
[id] => 22
[title] => Gru gru
[group_id] => 1
[price] => 3000
)
)
)
[7] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 2
[title] => Item B
[group_id] => 7
[price] => 0
)
)
)
[4] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 11
[title] => Item X
[group_id] => 4
[price] => 3000
)
)
)
[6] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 12
[title] => My Book
[group_id] => 6
[price] => 3000
)
)
)
[2] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 13
[title] => Item 1A
[group_id] => 2
[price] => 3000
)
)
[3] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 14
[title] => Bla bla
[group_id] => 3
[price] => 0
)
)
)
)
)
你知道怎么做吗？感谢您的帮助。
我想如果您只需要每个组中的第一个元素，则不需要结果集合中的组。
$data = $data
->groupBy('group_id')
->map(function ($group) {
$sorted = $group->sortBy('price');
return $sorted->first();
//or return collect([$sorted->first()]) if you need groups in resulted collection.
});
当我使用
$data_collect->groupBy('group_id')
然后给我这样的结果：
Illuminate\Support\Collection Object (
[items:protected] => Array
(
[1] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 1
[title] => Item A
[group_id] => 1
[price] => 4000
)
[1] => stdClass Object
(
[id] => 22
[title] => Gru gru
[group_id] => 1
[price] => 3000
)
)
)
[7] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 2
[title] => Item B
[group_id] => 7
[price] => 0
)
)
)
[4] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 11
[title] => Item X
[group_id] => 4
[price] => 3000
)
)
)
[6] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 12
[title] => My Book
[group_id] => 6
[price] => 3000
)
)
)
[2] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 13
[title] => Item 1A
[group_id] => 2
[price] => 3000
)
[1] => stdClass Object
(
[id] => 20
[title] => Item 1B
[group_id] => 2
[price] => 3000
)
)
)
[3] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 14
[title] => Bla bla
[group_id] => 3
[price] => 0
)
)
)
) )
但我想过滤掉重复数据以保持 lower "price" 值和 remove 更高的“price”值。所以结果将是这样的：
Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[1] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[1] => stdClass Object
(
[id] => 22
[title] => Gru gru
[group_id] => 1
[price] => 3000
)
)
)
[7] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 2
[title] => Item B
[group_id] => 7
[price] => 0
)
)
)
[4] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 11
[title] => Item X
[group_id] => 4
[price] => 3000
)
)
)
[6] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 12
[title] => My Book
[group_id] => 6
[price] => 3000
)
)
)
[2] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 13
[title] => Item 1A
[group_id] => 2
[price] => 3000
)
)
[3] => Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[0] => stdClass Object
(
[id] => 14
[title] => Bla bla
[group_id] => 3
[price] => 0
)
)
)
)
)
你知道怎么做吗？感谢您的帮助。
我想如果您只需要每个组中的第一个元素，则不需要结果集合中的组。
$data = $data
->groupBy('group_id')
->map(function ($group) {
$sorted = $group->sortBy('price');
return $sorted->first();
//or return collect([$sorted->first()]) if you need groups in resulted collection.
});