javascript - 循环遍历对象中的嵌套数组

Question

我想遍历这个 json 文件，并attendantName为每个商店打印。我能够打印键和值，并且能够打印服务员数组中的第一个服务员。但我需要打印数组中的所有服务员。我想我需要一个嵌套循环。我怎样才能做到这一点？这就是我到目前为止所拥有的。

脚本.js

var data;
var request = new XMLHttpRequest();

request.open('GET', 'js/tender-total-data.json');

request.onreadystatechange = function () {
  if (request.status === 200 && request.readyState === 4) {
    data = JSON.parse(request.responseText);
    $.each(data.stores, function(key, val){
      console.log("The key is: ", key, "The value is; ", val);
      console.log("Attendant Name: ", (val.attendants[0].attendantName));
      console.log(val.storeId);
    })

  }
};

request.send();

投标总数据.json

{
  "stores": [
        {
        "storeName": "Master Bistro",
        "storeId": "3046",
        "attendants": [
            {
            "attendantName": "Janis Joplin",
            "attendantId": "9784526",
            "total": 2000,
            "tenderTotal": {
                "Cash": 500,
                "TC": 0,
                "UOD": 500,
                "MC": 250,
                "VI": 250,
                "AX": 250,
                "DI": 250,
                "JC": 0,
                "DC": 0,
                "UOP": 0,
                "GN": 0,
                "UOGC": 0,
                "HOTEL": 0,
                "NCTNCG": 0
                }
            },
            {
            "attendantName": "David Bowie",
            "attendantId": "2589456",
            "total": 14675,
            "tenderTotal": {
                "Cash": 175,
                "TC": 0,
                "UOD": 100,
                "MC": 9500,
                "VI": 3500,
                "AX": 550,
                "DI": 850,
                "JC": 0,
                "DC": 0,
                "UOP": 0,
                "GN": 0,
                "UOGC": 0,
                "HOTEL": 0,
                "NCTNCG": 0
                }
            },
            {
            "attendantName": "Michael Jackson",
            "attendantId": "5478264",
            "total": 15599,
                "tenderTotal": {
                    "Cash": 250,
                    "TC": 0,
                    "UOD": 80,
                    "MC": 5624,
                    "VI": 6895,
                    "AX": 2500,
                    "DI": 250,
                    "JC": 0,
                    "DC": 0,
                    "UOP": 0,
                    "GN": 0,
                    "UOGC": 0,
                    "HOTEL": 0,
                    "NCTNCG": 0
                }
            }
        ],
            "message": "Store totals for 08/20/2018"
    },{

        "storeName": "The Master  Marketplace",
        "storeId": "3047",
        "attendants": [
            {
                "attendantName": "Dirk Novitski",
                "attendantId": "9784527",
                "total": 2000,
                "tenderTotal": {
                    "Cash": 500,
                    "TC": 0,
                    "UOD": 500,
                    "MC": 250,
                    "VI": 250,
                    "AX": 250,
                    "DI": 250,
                    "JC": 0,
                    "DC": 0,
                    "UOP": 0,
                    "GN": 0,
                    "UOGC": 0,
                    "HOTEL": 0,
                    "NCTNCG": 0
                }
            },
            {
                "attendantName": "Carmello Anthony",
                "attendantId": "2589458",
                "total": 14675,
                "tenderTotal": {
                    "Cash": 175,
                    "TC": 0,
                    "UOD": 100,
                    "MC": 9500,
                    "VI": 3500,
                    "AX": 550,
                    "DI": 850,
                    "JC": 0,
                    "DC": 0,
                    "UOP": 0,
                    "GN": 0,
                    "UOGC": 0,
                    "HOTEL": 0,
                    "NCTNCG": 0
                }
            },
            {
                "attendantName": "Stevie Wonder",
                "attendantId": "5478266",
                "total": 15599,
                "tenderTotal": {
                    "Cash": 250,
                    "TC": 0,
                    "UOD": 80,
                    "MC": 5624,
                    "VI": 6895,
                    "AX": 2500,
                    "DI": 250,
                    "JC": 0,
                    "DC": 0,
                    "UOP": 0,
                    "GN": 0,
                    "UOGC": 0,
                    "HOTEL": 0,
                    "NCTNCG": 0
                }

            }
        ],
            "message": "Store totals for 08/22/2018"
        }
    ]    
}

谢谢我感谢你的帮助。

标签： javascriptjqueryarraysjsonloops

Answer 1

你是对的，你需要另一个循环，但你可以让它更容易一点.forEach：

var data;
var request = new XMLHttpRequest();

request.open('GET', 'js/tender-total-data.json');

request.onreadystatechange = function () {
  if (request.status === 200 && request.readyState === 4) {
    data = JSON.parse(request.responseText);
    data.stores.forEach(function(key, val){
      console.log("The key is: ", key, "The value is; ", val);
      val.attendants.forEach(a => console.log("Attendant Name: ",a.attendantName));
      console.log(val.storeId);
    })

  }
};

request.send();