stackfinance-1

question:

https://leetcode.com/problems/join-two-arrays-by-id/description/

/**
 * @param {Array} arr1
 * @param {Array} arr2
 * @return {Array}
 */

var join = function(arr1, arr2) {
    const all_ids = {};
    let smallest = Number.MAX_SAFE_INTEGER;
    let largest = arr1[0].id;
    for (let i=0; i<arr1.length; ++i) {
        all_ids[arr1[i].id] = {...arr1[i]};
        smallest = Math.min(arr1[i].id, smallest);
        largest = Math.max(arr1[i].id, largest);
    }

    for (let i=0; i<arr2.length; ++i) {
        let obj = arr2[i];
        if(all_ids[obj.id] !== undefined) {
            all_ids[obj.id] = {...all_ids[obj.id], ...obj};
        } else {
            all_ids[obj.id] = {...all_ids[obj.id], ...obj};
        }
        smallest = Math.min(arr2[i].id, smallest);
        largest = Math.max(arr2[i].id, largest);
    }

    let ans = [];
    // console.log(all_ids, smallest, largest);
    for (let i=smallest; i<=largest; ++i) {
        ans.push(all_ids[i]);
    }
    

    return ans;
};