PHP：如何從關聯數組中刪除行

Question

我有一個關聯數組，其中鍵是日期時間類型數據（間隔為 15 分鍾）

    array:37 [▼
      "09:00" => Appointment {
                    #attributes: array:10 [▼
                        "id" => 1135
                        "startDateTime" => "2019-11-19 09:00:00"
                        "endDateTime" => "2019-11-19 09:45:00"
                        "duration" => 45
                    ]
                  }
      "09:15" => ""     // I want to delete this row -> 15 minutes
      "09:30" => ""     // I want to delete this row -> 30 minutes  end of the appointment
      "09:45" => ""
      "10:00" => Appointment {...duration => 60 ...}
      "10:15" => ""     // I want to delete this row -> 15 minutes
      "10:30" => ""     // I want to delete this row -> 30 minutes
      "10:45" => ""     // I want to delete this row -> 45 minutes
      "11:00" => ""     // I want to delete this row -> 60 minutes end of the appointment
      "11:15" => ""
      "11:30" => ""
      "11:45" => "" Appointment {...duration => 15 ...}
       ...
    ]

該數組將提供一個表格，因此我想根據每個約會的持續時間刪除后續行。 我需要它，因為我想將約會跨越幾行：

<td class="the-appointment" rowspan="{{ $appointment->duration / 15 }}">...

因此我需要從數組中消除后續行。

我這樣做了：

    $index = -1;
    foreach ($row as  $key => $appointment) {
        if ($appointment) {
            $loops = $appointment->duration / 15;
        }
        for ($i = 1; $i < $loops; $i++) {
            unset($row[$index + 1]);
            $index++;
        }
    }

    array_push($calendar, $row);

但由於它是一個關聯數組，我無法獲得循環的索引。 有沒有更聰明的方法來做到這一點？

Answer 1

一些代碼開始：

$duration = 0;
// I suggest to use array_filter and track `$duration` on each loop
$filtered = array_filter(
    $apps,
    function ($apm) use (&$duration) {
        if ($duration === 0) {
            if (!empty($apm->duration)) {
                $duration = $apm->duration - 15;
                return true;
            } else {
                return true;
            }
        } else {
            $duration -= 15;
            return false;    
        }
    }
);

在這里工作小提琴。

Answer 2

而不是使用foreach() ，您可以使用for()並使用持續時間來跳過不需要的條目。 結果被放入$slots 。

基本上，循環插槽中的時間，如果設置了持續時間，則將循環計數器增加約會的長度（持續時間/15 並使用ceil()將其四舍五入）...

$row = ["09:00" => (object)["duration" => 40],
    "09:15" => "",
    "09:30" => "",
    "09:45" => "",
    "10:00" => (object)["duration" => 60],
    "10:15" => "",
    "10:30" => "",
    "10:45" => "",
    "11:00" => "",
    "11:15" => "",
    "11:30" => "",
    "11:45" => (object)["duration" => 45]
];

$slots = [];
$times = array_keys($row);
for ( $i = 0; $i < count($times); $i++  )    {
    $appointment = $row[$times[$i]];
    $slots[$times[$i]] = $appointment;
    if ( $appointment->duration ?? 0 > 0 )  {
        $i += ceil($appointment->duration / 15);
    }
}
print_r($slots);

有了測試數據，這給出了......

(
    [09:00] => stdClass Object
        (
            [duration] => 40
        )

    [10:00] => stdClass Object
        (
            [duration] => 60
        )

    [11:15] => 
    [11:30] => 
    [11:45] => stdClass Object
        (
            [duration] => 45
        )

)