为什么在两个具有深度相等的元素的数组中，深度相等?

I have to arrays in javascript. Equality comparison on the elements with both === and == succeeds. But when I do a deep equals on the arrays with chai, I keep getting failure.

我必须使用javascript数组。对元素的相等比较，即===和==成功。但是当我在和chai的数组中做一个深度的等号时，我总是失败。

What am I doing wrong? Why is one array showing the element as a string. Clearly it's not actually a string, right? Otherwise the === operator would fail.

我做错了什么?为什么一个数组显示元素为字符串。显然它不是字符串，对吧?否则，==操作符将失败。

The type of the elements in the arrays is mongoose ObjectId.

数组中元素的类型是mongoose ObjectId。

The arrays:

数组:

A: ["57af9c0623a2c3b106efa7a8"]
B: [ 57af9c0623a2c3b106efa7a8 ]

A[0] === B[0] // true

The line which fails:

行失败:

expect(A).to.eql(B);

1 个解决方案

#1

This is two equals array but different objects.

这是两个相等的数组但是不同的对象。

var a = ['57af'];
var b = ['57af'];
console.log(a[0] === b[0], a === b);
---
true, false

Use to compare (from here)

用于比较(从这里)

isEqual = a.length == b.length && a.every(function(v,i) { return v === b[i]})

#1