无法获取数组内的json数据

Question

[
  {
    "May": [
        {
          "year": 1994,
          "date": "2"
        },
        {
          "Sequence": 2,
          "Type": "Images"
        }
    ],
    "_id": "1122"
  }
]

I can get id except "date" which is inside array. And date just show me undefined .

Answer 1

 var data = [ { "May": [ { "year": 1994, "date": "2" }, { "Sequence": 2, "Type": "Images" } ], "_id": "1122" } ]; alert(data[0].May[0]["date"]); 

You should use arr[i].May[0]['date'] , date is inside the object of the 0th index of array May.

Answer 2

Array will be start with the index 0 only . so from your json data 0th position only have the key named "date". So you should use like @void answer . If you had doubt about whether data is have or not use like below

if(data[0].May[0]["date"])
   alert(data[0].May[0]["date"]);

Thank you :)