从对象中选取给定属性的值放入数组中

Question

我有一个对象：

person = { 
    birth_year: 1970, 
    first_name: "John", 
    last_name: "Doe", 
    occupation: "Doctor", 
    city: "Boston",
    married: true 
}

我有一个按给定顺序排列的键名称数组：

keys = ["occupation", "last_name", "city"]

我想得到这个数组：

["Doctor", "Doe", "Boston"]

重要的是，答案应该保证顺序（JavaScript 不保证对象迭代的顺序）。

我认为 lodash/underscore 中可能有一些实用函数可以简单地完成此操作，但无法弄清楚。

Answer 1

与Lodash你可以使用pick和values

var o = {
  birth_year: 1970,
  first_name: "John",
  last_name: "Doe",
  occupation: "Doctor",
  city: "Boston",
  married: true
}
var keys = ["occupation", "last_name", "city"];

var result = _.values(_.pick(o, keys));
console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>