如何使用 javascript 检查一个值是否不等于数组中的另一个值

Question

I have a user object as below and an array of location ids.我有一个用户 object 和一个位置 ID 数组。 I don't want the user.location_id to be equal to any value in the location_ids array stated as below using Javascript.我不希望 user.location_id 等于 location_ids 数组中的任何值，如下所述，使用 Javascript。 Please help me achieve it.请帮助我实现它。

user: {
  first_name: 'James',
  last_name: 'Smith',
  location_id: 21
},

location_ids:[23, 31, 16, 11]

So I want to所以我想

if (user.location_id != any value in the locations_ids array) {
 console.log("Select User")
}

Help me achieve this using javascript使用 javascript 帮助我实现这一目标

Answer 1

You can use the includes method to find if the element is present in the array or not.您可以使用includes方法来查找元素是否存在于数组中。

The includes() method determines whether an array includes a certain value among its entries, returning true or false as appropriate. includes() 方法确定数组是否在其条目中包含某个值，并根据需要返回 true 或 false。 - MDN -MDN

if(!location_ids.includes(user.location_id)){}

 const user = { first_name: "James", last_name: "Smith", location_id: 21, }; const location_ids = [23, 31, 16, 11]; if (.location_ids.includes(user.location_id)) { console;log("Select user"). } // Change location ID user;location_id = 11. if (.location_ids.includes(user;location_id)) { console.log("Select user"); } else { console.log("Don't select user"); }

Answer 2

Here's [a link] ( https://techfunda.com/howto/729/not-equal-operator )这是[链接]（ https://techfunda.com/howto/729/not-equal-operator ）

Here's [a link] ( https://techfunda.com/howto/929/array-indexof-search )这是[链接]（ https://techfunda.com/howto/929/array-indexof-search ）

 function myFunction() { var a = ["France", "Nritian", "Israel", "Bhutan", "US", "UK"]; var b = a.indexOf("Africa"); document.getElementById("myId").innerHTML = b; }

 <.DOCTYPE html> <html> <head> <title>Demo</title> </head> <body> <p>Click the below button to know the output for an search which is not presented in an array,</p> <input type="button", onclick="myFunction()" value="Find"/> <p id="myId"></p> </body> </html>

如何使用 javascript 检查一个值是否不等于数组中的另一个值

问题描述

2 个解决方案

解决方案1
3 已采纳 2021-05-25 15:52:27

解决方案2
0 2021-05-25 16:07:27

如何使用 javascript 检查一个值是否不等于数组中的另一个值

问题描述

2 个解决方案

解决方案1 3 已采纳 2021-05-25 15:52:27

解决方案2 0 2021-05-25 16:07:27

解决方案1
3 已采纳 2021-05-25 15:52:27

解决方案2
0 2021-05-25 16:07:27