Question

{
    "page": 2,
    "per_page": 6,
    "total": 12,
    "total_pages": 2,
    "data": [
        {
            "id": 7,
            "email": "michael.lawson@reqres.in",
            "first_name": "Michael",
            "last_name": "Lawson",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/follettkyle/128.jpg"
        },
        {
            "id": 8,
            "email": "lindsay.ferguson@reqres.in",
            "first_name": "Lindsay",
            "last_name": "Ferguson",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/araa3185/128.jpg"
        },
        {
            "id": 9,
            "email": "tobias.funke@reqres.in",
            "first_name": "Tobias",
            "last_name": "Funke",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/vivekprvr/128.jpg"
        },
        {
            "id": 10,
            "email": "byron.fields@reqres.in",
            "first_name": "Byron",
            "last_name": "Fields",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/russoedu/128.jpg"
        },
        {
            "id": 11,
            "email": "george.edwards@reqres.in",
            "first_name": "George",
            "last_name": "Edwards",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/mrmoiree/128.jpg"
        },
        {
            "id": 12,
            "email": "rachel.howell@reqres.in",
            "first_name": "Rachel",
            "last_name": "Howell",
            "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/hebertialmeida/128.jpg"
        }
    ]
}

上面的

是json响应。它具有字段名称“ id，电子邮件，first_name，last_name和化身”。我需要验证每个字段的数量。预期的输出是：id-6，名6，电子邮件6，last_name-6和化身6。而且我不想硬编码，这些字段存在于一个csv文件中。意味着我不想对字段名进行硬编码，我想进行参数化，以便它从csv文件读取数据。这样，即使我必须获得100个字段的计数，代码也应该可以工作。如果需要其他详细信息，请告诉我

Answer 1

您可以这样简单地计数

console.log(value.data.length)

除非有可能没有id字段，否则您可以这样做

var count = 0;
for (let i =0; i < value.data.length; i++) {
  if(value.data[i].id != undefined) count++
}

console.log(count)

我想计算ID在Json Response中出现的次数

1 个答案: