.filter不是函数 [英] .filter is not a function

问题描述

这是我的对象（确保它是typeof对象）：

This is my object (made sure it's a typeof object):

{
    "1": {"user_id":1,"test":"","user_name":"potato0","isok":"true"},

    "2":{"user_id":2,"test":"","user_name":"potato1","isok":" true"},

    "3":{"user_id":3,"test":"","user_name":"potato2","isok":" true"},

    "4":{"user_id":4,"test":"","user_name":"potato3","isok":"locationd"}

}

为什么使用 .filter 对我不起作用？

Why using .filter doesn't work for me?

是因为我的变量是 typeof object 并且该方法仅适用于数组吗？

Is it because my variable is typeof object and the method works only with arrays?

this.activeUsers = window.users.filter( function(user) {
     // return ( (user.test === '0') && (user.isok === '0') ); 
     return user.user_id === 1;
}); 

得到错误：

.filter不是函数

.filter is not a function

建议的对象替代方案是什么？

What is the suggested alternative with objects?

推荐答案

filter 是对数组的一种方法。由于您发布的代码包含一个对象，因此您会看到此错误。在使用 Object.values ，例如：

filter is a method on arrays. Since the code you posted contains an object, you're seeing this error. You may want to apply filter after getting all the values from the object using Object.values, like this:

var users = {
  "1": {
    "user_id": 1,
    "test": "",
    "user_name": "potato0",
    "isok": "true"
  },

  "2": {
    "user_id": 2,
    "test": "",
    "user_name": "potato1",
    "isok": " true"
  },

  "3": {
    "user_id": 3,
    "test": "",
    "user_name": "potato2",
    "isok": " true"
  },

  "4": {
    "user_id": 4,
    "test": "",
    "user_name": "potato3",
    "isok": "locationd"
  }
};

console.log(Object.values(users).filter(user => user.user_id === 1));

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