Question 257450 in Javascript Question posted in
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Check if array of values exist in other array of object data in javascript

I have this array

const a1 = ["[email protected]", "[email protected]", "[email protected]"];

const b1 = [
    {
        "Name": "username",
        "Email": "[email protected]"
    },
    {
        "Name": "username2",
        "Email": "[email protected]"
    },
];

I want to get all email which does not exist in b1 and is there in a1

without object in array i’m able to check with filter

this.a1.filter(x => !b1.includes(x))
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2

Answers


  1. 0 
    const a1 = ["[email protected]", "[email protected]", "[email protected]"];

const b1 = [
    {
        "Name": "username",
        "Email": "[email protected]"
    },
    {
        "Name": "username2",
        "Email": "[email protected]"
    },
];

const emailsNotInB1 = a1.filter(email => !b1.some(obj => obj.Email === email));

console.log(emailsNotInB1);
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  2. 0 
    // checks array
const checkEmails = (emails) => {
  return emails.filter(email => !b1.some(obj => obj.Email === email));
}

// call
console.log(checkEmails(a1));

    hope it helps!

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