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
})
}find duplicates array javascript
let arr = [1, 7, 8, 9, 10, 20, 33, 0, 20, 7, 1]
console.log([... new Set(arr)]
// Output : [1, 7, 8, 9, 10, 20, 33, 0]Copyright © 2021 Codeinu
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