无法读取未定义 Javascript 的属性“推送”

Cannot read property 'push' of undefined Javascript

提问by Stweet

Hi it seams like i can't push my array ? code:

嗨，接缝好像我不能推动我的阵列？代码：

  $scope.arrResult = [];
  dpd.timesheets.get( function (result) {
    console.log(result);

    for (i = 0, n = result.length; i < n; i++) {
      var item = result[i];
      $scope.arrResult[item.week].push(item);
    }
    console.log($scope.arrResult);

  });

i get this console error

我收到此控制台错误

Uncaught TypeError: Cannot read property 'push' of undefined

if i set $scope.arrResult[item.week].push(item); to $scope.arrResult[item.week] = item;it works with no error but i need / want to push, whats wrong ?

如果我设置$scope.arrResult[item.week].push(item); to $scope.arrResult[item.week] = item;它没有错误，但我需要/想要推送，怎么了？

回答by AmmarCSE

This is because

这是因为

$scope.arrResult[item.week]

itself is not an array.

本身不是数组。

push()is of Array.prototype

push()是Array.prototype

To see what I mean, try

要明白我的意思，请尝试

$scope.arrResult[item.week] = [];

or

或者

$scope.arrResult[item.week] = new Array();

and then try push()

然后尝试 push()