Saw an interesting piece of code to find a lonely number in a list of duplicate numbers (where every number in the list occurs twice except for one).
function findNonPaired(listOfNumbers) {
let nonPairedNumber = 0
listOfNumbers.forEach((n) => {
nonPairedNumber ^= n
})
return nonPairedNumber
}
const x = [1,5,4,3,9,2,3,1,4,5,9]
console.log(findNonPaired(x))
This solution looks very elegant, but I'm curious at to what the ^=
operator is actually doing here?