[Algorithm] 33 week(9.12 ~ 9.18) 3/3

202. Happy Number

var isHappy = function(n) {
    
    const seen = {}
    let count = n;
    
    while (count != 1) {
        console.log('count', count in seen)
        if (count in seen) {
            return false 
        } else {
            seen[count] = count
            count = count.toString().split('').reduce((acc, num) => acc + (num * num), 0)
        }
    }
    return true 
};