javascript - JS/jQuery : Filter object properties by array

Question

让我们看一个 JS 对象示例(又名“关联数组”):

var zoo = {
  monkey: { legs: 4, color: "black" },
  fish: { legs: 0, color: "yellow" },
  turtle: { legs: 4, color: "green" },
  emu: { legs: 2, color: "gray" },
};

现在我想检索水生动物的嵌套对象(也称为“子数组”)。是否有标准的 JS/jQuery 构造或函数来按数组过滤对象属性(“按数组索引数组”)，即类似:

var aquatic = zoo["fish", "turtle"];

结果显然应该是{ { Legs: 0, color: "yellow"}, { Legs: 4, color: "green"} }。

或者 for 循环是这里最简单的解决方案吗？

Answer 1

您可以使用map()并返回对象数组。

var zoo = {
  monkey: { legs: 4, color: "black" },
  fish: { legs: 0, color: "yellow" },
  turtle: { legs: 4, color: "green" },
  emu: { legs: 2, color: "gray" },
};
var aquatic = ["fish", "turtle"];

var result = aquatic.map(e => zoo[e]);
console.log(result)