find duplicates in array
function findDuplicates(arr) {
const duplicates = new Set()
return arr.filter(item => {
if (duplicates.has(item)) {
return true
}
duplicates.add(item)
return false
})
}find duplicates in array
function findDuplicates(arr) {
const duplicates = new Set()
return arr.filter(item => {
if (duplicates.has(item)) {
return true
}
duplicates.add(item)
return false
})
}javascript check for duplicates in array
function checkIfDuplicateExists(w){
return new Set(w).size !== w.length
}
console.log(
checkIfDuplicateExists(["a", "b", "c", "a"])
// true
);
console.log(
checkIfDuplicateExists(["a", "b", "c"]))
//falseCopyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
