Question

使用此数据，如何找到Customer对象和所有子元素对象的键计数？

const Customer = {
"Profile": {
    "A1": {
        "A2": "",
        "A3": "E",
        "A4": "",
        "A5": {
            "Cus": "",
            "Bil": ""
        },
        "Services": [{
            "vA": {
                "Status": 2,
                "Switch-CLLi": "",
                "PLIST": [{
                    "Status": "",
                    "Price": 0
                }, {
                    "Status": "",
                    "Price": 40
                }]
            }
        }]
    },
    "B1": {
        "B2": 953108717,
        "B3": "04"
    }
}}

Answer 1

您可以为此进行用户递归。

const countKeys = (obj, result) => {
    const keys = Object.keys(obj);
   result.sum+= keys.length;
   result.keys = [...result.keys, ...keys];
   keys.forEach(key => {
      if(typeof(obj[key]) === 'object')
       result= countKeys(obj[key],result);
   })
   return result;
};

在您的方法中调用此方法

const totalKeys = countKeys(yourObject, { sum: 0, keys: []});

Answer 2

尽量不要重新发明轮子，而要找到一个很好的数据处理库并进行学习。我们几乎所有内容都使用object-scan。一旦将头缠住它，它就会非常强大。这是解决问题的方法

const objectScan = require('object-scan');

const count = (data) => objectScan(['**'], {
  filterFn: ({ property, context }) => {
    if (typeof property === 'string') {
      context[property] = (context[property] || 0) + 1;
    }
  }
})(data, {});

const Customer = {"Profile":{"A1":{"A2":"","A3":"E","A4":"","A5":{"Cus":"","Bil":""},"Services":[{"vA":{"Status":2,"Switch-CLLi":"","PLIST":[{"Status":"","Price":0},{"Status":"","Price":40}]}}]},"B1":{"B2":953108717,"B3":"04"}}};

console.log(JSON.stringify(count(Customer)));
// => {"B3":1,"B2":1,"B1":1,"Price":2,"Status":3,"PLIST":1,"Switch-CLLi":1,"vA":1,"Services":1,"Bil":1,"Cus":1,"A5":1,"A4":1,"A3":1,"A2":1,"A1":1,"Profile":1}

如何查找对象中存在的键总数以及内部嵌套对象（分配给javascript中的变量）的总数

2 个答案: