javascript - 您可以使用字符串模板文字将整个对象作为字符串返回吗？

Question

我有这个问题:

This function should take an argument as an object, and return a string with the user's details in the form:

'name: Mitch, age: 27, language: Javascript'

Note - this is a good use case of string template literals.

function createUserString(userObj) {

}

任何人都可以帮助解释如何将对象属性转换为完整字符串吗？

Answer 1

我想使用Object.entries()和 Array.prototype.reduce()一起可以解决您的问题。阅读他们的文档:

The reduce() method executes a reducer function (that you provide) on each element of the array, resulting in a single output value.

The Object.entries() method returns an array of a given object's own enumerable string-keyed property [key, value] pairs, in the same order as that provided by a for...in loop.

看看可能的好解决方案:

const user = {
  name: 'Mitch',
  age: 27,
  language: 'JavaScript',
  nickName: 'Cool Mitch' // just added one more property for representation
};

const createUserString = user => {
  const entries = Object.entries(user);
  return entries.reduce((a, [k,v]) => a ? `${a}, ${k}: ${v}` : `${k}: ${v}`, '');
}

console.log(createUserString(user));

希望对您有所帮助!