lonelyinteger
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function lonelyinteger(a) {
// Write your code here
const hash = {};
for(var i = 0; i < a.length; i++){
const number = a[i];
if (hash[number]){
hash[number].push(number);
} else {
hash[number] = [number];
}
}
console.log(hash);
for (var key in hash){
if (hash[key].length === 1)
console.log(key);
}
}
const a = [1,2,3,4,3,2,1];
lonelyinteger(a);
JavaScript
INFO