How to check if a value is not equal to another value in the array using javascript

Question

I have a user object as below and an array of location ids. I don't want the user.location_id to be equal to any value in the location_ids array stated as below using Javascript. Please help me achieve it.

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

location_ids:[23, 31, 16, 11]

So I want to

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

Help me achieve this using javascript

if (!location_ids.includes(user.location_id)) { console.log("Select user"); } — DecPK
– DecPK, Commented May 25, 2021 at 15:52

DecPK · Accepted Answer · 2021-05-25 16:04:26Z

3

You can use the includes method to find if the element is present in the array or not.

The includes() method determines whether an array includes a certain value among its entries, returning true or false as appropriate. - 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");
}

edited May 25, 2021 at 16:04

DecPK

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answered May 25, 2021 at 15:52

Rajdeep D

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3 Comments

DecPK Over a year ago

OP does not want the user.location_id in the array so you should negate the includes result.

Rajdeep D Over a year ago

Thank you @decpk, great finding mate.

DecPK Over a year ago

It is better to explain how your answer solved OP's problem....

Kunal · Accepted Answer · 2021-05-25 16:07:27Z

0

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

Here's [a link] (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>

answered May 25, 2021 at 16:07

Kunal

138 bronze badges

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