Question

我有一系列日期。我想删除不在两个日期之间的日期。但我得到的某些日期甚至在“从”日期之前。我做错了什么？

$scope.filterUpcomingEvents = function() {

    $scope.arrayOfEventData = JSON.parse(JSON.stringify($scope.tempArray));

    console.log($scope.tempArray, "arrayofeve");
    for (let d = 0; d < $scope.arrayOfEventData.length; d++) {
        debugger;
        console.log(d);
        console.log(new Date($scope.tempArray[d].event_date), "from", $scope.upcomingEventFrom);
        console.log(new Date($scope.tempArray[d].event_date) < $scope.upcomingEventFrom);
        console.log(new Date($scope.tempArray[d].event_date), "to", $scope.upcomingEventTo);
        console.log(new Date($scope.tempArray[d].event_date) > $scope.upcomingEventTo);
        console.log("---");
        if (new Date($scope.arrayOfEventData[d].event_date) < $scope.upcomingEventFrom || new Date($scope.arrayOfEventData[d].event_date) > $scope.upcomingEventTo) {
            $scope.arrayOfEventData.splice(d, 1);
        }
    }
    console.log($scope.arrayOfEventData, "after splice");
}

在控制台中，虽然我对某些比较感到满意，但它没有被拼接。当我看到最终数组时，它仍然具有应该被拼接的值，尽管它是真的并且进入if。

日期数组：

0: {
        event_id: "49",
        event_name: "julyevent",
        event_date: "2018-07-13",
        event_time: "11:00AM",
        event_type_id: "2",
        …
    }
1: {
        event_id: "50",
        event_name: "up event1",
        event_date: "2018-06-22",
        event_time: "11:11AM",
        event_type_id: "2",
        …
    }
2: {
        event_id: "52",
        event_name: "twe",
        event_date: "2018-06-29",
        event_time: "11:11AM",
        event_type_id: "2",
        …
    }
3: {
        event_id: "55",
        event_name: "eve4",
        event_date: "2018-06-23",
        event_time: "10:22PM",
        event_type_id: "2",
        …
    }
4: {
        event_id: "56",
        event_name: "eve5",
        event_date: "2018-06-25",
        event_time: "11:11AM",
        event_type_id: "2",
        …
    }
5: {
        event_id: "57",
        event_name: "eve6",
        event_date: "2018-06-28",
        event_time: "10:00AM",
        event_type_id: "2",
        …
    }
6: {
        event_id: "58",
        event_name: "eve7",
        event_date: "2018-06-28",
        event_time: "9:00AM",
        event_type_id: "2",
        …
    }
7: {
        event_id: "59",
        event_name: "eve8",
        event_date: "2018-07-12",
        event_time: "7:00AM",
        event_type_id: "2",
        …
    }
8: {
        event_id: "60",
        event_name: "eve9",
        event_date: "2018-06-19",
        event_time: "4:00AM",
        event_type_id: "2",
        …
    }
9: {
        event_id: "61",
        event_name: "eve10",
        event_date: "2018-06-20",
        event_time: "8:00PM",
        event_type_id: "2",
        …
    }
10: {
        event_id: "62",
        event_name: "eve11",
        event_date: "2018-06-23",
        event_time: "3:00AM",
        event_type_id: "2",
        …
    }
11: {
        event_id: "63",
        event_name: "eve12",
        event_date: "2018-06-21",
        event_time: "10:22PM",
        event_type_id: "2",
        …
    }
12: {
        event_id: "64",
        event_name: "eve13",
        event_date: "2018-06-24",
        event_time: "6:00AM",
        event_type_id: "2",
        …
    }

Answer 1

当你从循环渐进的同一个数组拼接时，数组会修改并且项目会被移位。因此，您可能会错过迭代。

你可以做的一件事是使用while循环向后循环，这样你就不会循环你拼接的方向。

let i = $scope.arrayOfEventData.length;
while(i--){
  // your code
}

Answer 2

您可以直接使用Array.filter：

 $scope.arrayOfEventData =  $scope.arrayOfEventData.filter((a)=>(new Date(a.event_date) >= $scope.upcomingEventFrom || new Date(a.event_date) <= $scope.upcomingEventTo )));

Answer 3

问题的原因是，当您删除某个元素时，仍然使用 d ++ 递增 d 。如果您想保留代码，请从循环中删除 d ++ ：

for (let d=0; d<...;      ) // no d++
...
  if ()
    splice(d, 0);
  else
    d++;

但是如果使用Array.filter，则可以避免此类问题。

过滤两个日期之间的日期数组

3 个答案: