javascript - ReactJS 循环对象不返回值

Question

我有:

let contactData = {};
        if (this.props.enquiry.contact) {
            contactData.name = this.props.enquiry.contact.firstName + ' ' + this.props.enquiry.contact.lastName;
        }

然后:

Object.keys(this.props.data).map((line, idx) => {
            console.log(line)
        });

但输出是键(名称)而不是值。如何获取 name 参数的值？

Answer 1

像这样

Object.keys(this.props.data).map((line, idx) => {
  console.log(this.props.data[line]); // get value from Object by key
});

Object.keys() method returns an array of a given object's own enumerable properties

示例

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

// Object.keys(obj) returns ['a', 'b'];
var res = Object.keys(obj).map((key) => {
  // in order to get value from Object by key we can use bracket notation
  return obj[key];
});

console.log(res);