使用数组值验证JSON响应

Question

我有一个JSON响应，如下所示（在数组值中）。我想验证是否在响应中正确检索了Keys（属性）。我想比较一个预期值列表与响应值（只有第一组数组值） 例如：

"participants": [
    {
        "FirstName": "Kim",
        "LastName": "Hykes",
        "Street1": "ABC",
        "Street2": "ABCD",
        "City": "city1",
        "State": "NJ" 
    }

    {
        "FirstName": "John",
        "LastName": "David",
        "Street1": "XYZ",
        "Street2": "UXYZ",
        "City": "city2",
        "State": "NY" 
     } 
]

使用JSONparser，解析上面的JSON，结果将是：

participants[0].FirstName, participants[0].LastName, 
participants[0].Street1, participants[0].Street2, participants[0].City, 
participants[0].State, participants[1].FirstName, 
participants[1].LastName, 
participants[1].Street1, participants[1].Street2, participants[1].City, 
participants[1].State

它持续到50名参与者

我想看看是否从数据库中获取了所有必需的密钥，并且只想检查第一个数组字段，即仅在参与者[0]中。

任何人都可以帮我解决这个问题吗？

Answer 1

你的意思是这样的，要验证密钥是否在那里，并且顺序正确吗？

var response = {"participants": [
    {
        "FirstName": "Kim",
        "LastName": "Hykes",
        "Street1": "ABC",
        "Street2": "ABCD",
        "City": "city1",
        "State": "NJ" 
    },
    {
        "FirstName": "John",
        "LastName": "David",
        "Street1": "XYZ",
        "Street2": "UXYZ",
        "City": "city2",
        "State": "NY" 
     } 
]
}
var keysNeeded = ['FirstName', 'LastName', 'Street1', 'Street2', 'City', 'State']

var i = 0;

for (key in response.participants[0]) {
 if (key == keysNeeded[i]) {
 console.log('all is OK with key '+key)
 }
 i++;
}