javascript中的一组对象

本文介绍了javascript中的一组对象的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想在 Javascript 中有一组对象.即，只包含唯一对象的数据结构.

I'd like to have a set of objects in Javascript. That is, a data structure that contains only unique objects.

通常推荐使用属性，例如myset["key"] = true.但是，我需要将键作为对象.我读过 Javascript 将属性名称转换为字符串，所以我想我不能使用 myset[myobject] = true.

Normally using properties is recommended, e.g. myset["key"] = true. However, I need the keys to be objects. I've read that Javascript casts property names to strings, so I guess I can't use myset[myobject] = true.

我可以使用数组，但我需要比 O(n) 性能更好的东西来添加、查找和删除项目.

I could use an array, but I need something better than O(n) performance for adding, finding and removing items.

它需要能够仅通过引用区分对象，因此给出:

It needs to be able to tell objects apart by reference only, so given:

var a = {}; var b = {};

那么 a 和 b 应该都可以添加，因为它们是单独的对象.

then both a and b should be able to be added, because they're separate objects.

基本上，我在寻找类似 C++ 的 std::set 之类的东西，它可以存储 Javascript 对象.有什么想法吗?

Basically, I'm after something like C++'s std::set, that can store Javascript objects. Any ideas?

推荐答案

ES6 提供了一个原生的 设置:

ES6 provides a native Set:

let s = new Set(); let a = {}; let b = {}; s.add(a); console.log(s.has(a)); // true console.log(s.has(b)); // false