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Email duplication check from array

I have two emails and I'm trying to check if it matches anything in my data array which is a an array of emails.

I thought the below would return true or false but it seems to be not working.

const email1 = test.emailAddress.value;
const email2 = test2.emailAddress.value;

data.every(( email ) => email.value === email1 || email.value === email2);


some()

email1

email2

data

3 Answers
3

You can filter your data with the matched array of two emails like so:

filter

const data = [
email: 'test@test.com',
email: 'test1@test.com',
email: 'test2@test.com'
]

const email1 = 'test1@test.com'
const email2 = 'test2@test.com'

const matched = data.filter(( email ) => [email1, email2].includes(email));
console.log(matched)

According to your code, the .every method checks if every email in the data array is either email1 or email2, if at least one of the emails in the data array fails the condition, the .every method returns false. Which means that the .every method is not suitable for what you want to achieve.

.every

email

data

email1

email2

data

.every

.every

var exists = data.filter((email) => [email1, email2].includes(email)).length > 0


Unless you provide your data it is hard to figure out what is going on. But you can useincludes to check if an element is present in an array or not.

data

includes

The includes() method determines whether an array includes a certain element, returning true or false as appropriate.

if( data.includes(email1) || data.includes(email2))


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