javascript - 从对象中选取给定属性的值到数组中

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做到这一点，但无法弄清楚。

Answer 1

在 Lodash 中，您可以使用 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)

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