JavaScript：如何添加自定义 class object 作为数组的键

Question

I have created a custom class with the property “name”

I also added a function to the class which returns true if 2 objects have the same name. This function works when I compare 2 custom objects with the same name.

However, I am facing problems when I added these custom class objects as keys in an array/object.

Suppose my custom class object is a. It is also a key in an array. When I compare a with the keys in the array, I get that a is not in the array.

My class constructor:

 class node { constructor(name) { this.name = name; } getname() { return this.name; } equiv(other) { return Boolean(this.name == other.name); } inarray(array) { for (let key in array) { if (this.name== key.name) { return true; } } return false; } } var a = new node("assss"); var b = new node("bssss"); var a2 = new node("assss"); var c = {a:1, b:2} console.log( a.equiv(a2) ) // true //But console.log( a.inarray(c) ) // false

a.equiv(a2) returns true
But
a.inarray(c) returns false

^ this is my issue

Answer 1

since you have upadated your question:

just replace

if (this.name == key.name)

by

if (this.name == key)

because key is a string (not an object) and it' values are 'a' or 'b'
they are the keys of { a :1, b :2 }

 class node { constructor(name) { this.name = name; } getname() { return this.name; } equiv(other) { return Boolean(this.name == other.name); } inarray(array) { for (let key in array) { if (this.name == key) { return true; } } return false; } } var a = new node("a"), b = new node("b"), a2 = new node("a"), c = { a:1, b:2 }; console.log( a.equiv(a2) ) // true console.log( a.inarray(c) ) // true