migratoryBirds.js

// source: https://www.hackerrank.com/challenges/migratory-birds/problem
// video: https://youtu.be/L83yEmlW3qM

function migratoryBirds(arr) {
    let max = 0;
    let max_id = 6;
    let store = new Array(6).fill(0);
    for(const num of arr){
        store[num]++;
        if(store[num] > max){
            max = store[num]
            max_id = num;
        }else if(store[num] === max && num < max_id){
            max_id = num;
        }
    }
    return max_id;
}