什么是从数组中过滤对象所需的最简单的JavaScript [英] What is the briefest JavaScript necessary to filter objects from an array

问题描述

给定数组

let arr = [1,2,true,4,{"abc":123},6,7,{"def":456},9,[10],{},"[object Object]"];
/*
let res = // briefest `javascript` text to filter objects from `arr`
*/

预期结果 res

[{"abc":123},{"def":456},{}];

什么是必需的简短 javascript 从原始数组中过滤对象？

What is the briefest javascript text necessary to filter objects from the original array?

推荐答案

可以使用 Array.prototype.filter（） code>。从匹配中排除字符串[object Object]，使用''+元素将元素转换为字符串，返回 Boolean 使用identity运算符的元素的结果，该元素作为字符串等于[object Object]

You can use Array.prototype.filter(). Exclude string "[object Object]" from matches, cast element to string with ''+element, return Boolean result of check using identity operator that element as string is equal to "[object Object]"

let arr = [1,2,true,4,{"abc":123},6,7,{"def":456},9,[10],{},"[object Object]"];

let res = arr.filter(o=>''+{}!==o&&''+o===''+{});

console.log(res);

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