将元素附加到 Laravel 集合的每一行以保存该行中所有值的总和

Question

我一直在获取集合中每一行的总和。

请参阅显示阵列的附图。

八月份：

"Aug-2022" => array:6 [▼

  "annualbuffalomilksalerecordforcustomer" => "8.00"
  "annuala2milksalerecordforcustomer" => "5.50"
  "annualjerseymilksalerecordforcustomer" => "2.50"
  "annualbuffalomilksalerecord" => "168.00"
  "annuala2milksalerecord" => "0.00"
  "annualjerseymilksalerecord" => "390.00"

我想计算所有值的总和 (574.00) 并将一个新元素附加到键为

sumofmilksale

的行。

预期结果：

"Aug-2022" => array:6 [▼
  "annualbuffalomilksalerecordforcustomer" => "8.00"
  "annuala2milksalerecordforcustomer" => "5.50"
  "annualjerseymilksalerecordforcustomer" => "2.50"
  "annualbuffalomilksalerecord" => "168.00"
  "annuala2milksalerecord" => "0.00"
  "annualjerseymilksalerecord" => "390.00"
  "sumofmilksale" => "574.00"

Answer 1

您可以使用

map()

函数来做到这一点：

$collection = collect([
  'Apr-2022' => [
    "annualbuffalomilksalerecordforcustomer" => "8.00",
    "annuala2milksalerecordforcustomer" => "5.50",
    "annualjerseymilksalerecordforcustomer" => "2.50",
    "annualbuffalomilksalerecord" => "168.00",
    "annuala2milksalerecord" => "0.00",
    "annualjerseymilksalerecord" => "390.00",
  ],
  'May-2022' => [
    "annualbuffalomilksalerecordforcustomer" => "8.00",
    "annuala2milksalerecordforcustomer" => "5.50",
    "annualjerseymilksalerecordforcustomer" => "2.50",
    "annualbuffalomilksalerecord" => "168.00",
    "annuala2milksalerecord" => "0.00",
    "annualjerseymilksalerecord" => "390.00",
  ],
]);

$mapped = $collection->map(function ($entry) {
  $sum = array_sum($entry);

  return array_merge($entry, ['sumofmilksale' => $sum]);
})

dd($mapped);

Answer 2

肯尼建议的解决方案的更现代/优雅的风格是在

map()

方法调用中使用箭头函数语法和联合运算符。 (PHPize 演示)

$collection = collect([
    "Jul-2022" => [],
    "Aug-2022" => [
        "annualbuffalomilksalerecordforcustomer" => "8.00",
        "annuala2milksalerecordforcustomer" => "5.50",
        "annualjerseymilksalerecordforcustomer" => "2.50",
        "annualbuffalomilksalerecord" => "168.00",
        "annuala2milksalerecord" => "0.00",
        "annualjerseymilksalerecord" => "390.00",
    ],
]);

var_export(
    $collection->map(fn($row) => $row + ['sumofmilksale' => array_sum($row)])
);

输出：

\Illuminate\Support\Collection::__set_state(array(
   'items' => 
  array (
    'Jul-2022' => 
    array (
      'sumofmilksale' => 0,
    ),
    'Aug-2022' => 
    array (
      'annualbuffalomilksalerecordforcustomer' => '8.00',
      'annuala2milksalerecordforcustomer' => '5.50',
      'annualjerseymilksalerecordforcustomer' => '2.50',
      'annualbuffalomilksalerecord' => '168.00',
      'annuala2milksalerecord' => '0.00',
      'annualjerseymilksalerecord' => '390.00',
      'sumofmilksale' => 574.0,
    ),
  ),
   'escapeWhenCastingToString' => false,
))

---

如果您的集合包含集合，您可以使用

put()

迭代调用

sum()

。 (PHPize 演示)

$collection = collect([
    "Jul-2022" => collect([]),
    "Aug-2022" => collect([
        "annualbuffalomilksalerecordforcustomer" => "8.00",
        "annuala2milksalerecordforcustomer" => "5.50",
        "annualjerseymilksalerecordforcustomer" => "2.50",
        "annualbuffalomilksalerecord" => "168.00",
        "annuala2milksalerecord" => "0.00",
        "annualjerseymilksalerecord" => "390.00",
    ]),
]);

var_export(
    $collection->map(fn($coll) => $coll->put('sumofmilksale', $coll->sum()))
);