Question

我正在尝试验证请求对象，以检查对象中是否存在特定键。我已经尝试过return np.array([points[closest==k].mean(axis=0) for k in range(k)])的{{1}}函数，但是似乎lodash检查嵌套的JSON。 Javascript的has()一次需要一个键。是否可以检查纯JSON对象中的键数组？

我要检查的对象是

_.has()

Answer 1

只需使用Object.keys即可

const neededKeys = ['oldPassword', 'name', 'newPassword'];

const obj = {
    "name": "admin@test.org",
    "oldPassword": "1234",
    "newPassword": "12345"
}

console.log(neededKeys.every(key => Object.keys(obj).includes(key)));

Answer 2

您可以使用数组的.includes方法，Object.keys将为您提供所有键的数组。您可以将其与要使用循环检查的一系列键进行比较

var a = {
  "name": "admin@test.org",
  "oldPassword": "1234",
  "newPassword": "12345"
};
var key = ["name", "oldPassword", "newPassword"];
Object.keys(a).forEach(e => key.includes(e) ? console.log(e + " found") : console.log(e + " not found"))

Answer 3

如果您的键不是动态的并且数量很少，则可以像这样检查并避免高阶数组方法的性能损失：

let obj = { a: 1, b: 2 };

"a", "b" in obj; -> true
"z" in obj -> false

Answer 4

myobj =  {
    "name": "admin@test.org",
    "oldPassword": "1234",
    "newPassword": "12345"
}

Print (myobj.keys() >= {"name","oldPassword","newPassword"})

-这将返回True

Print (myobj.keys() >= {"name1","id","firstname"})

-这将返回false

检查json对象中是否存在多个键

4 个答案: