const solution = (former, latter) =>
[...former, ...latter].sort((a, b) => a - b);
const result = solution([1, 3, 5], [2, 3, 6, 7, 9]);
console.log(result);
const solution = (former, latter) => {
former.sort((a, b) => a - b);
latter.sort((a, b) => a - b);
const result = [];
while (former.length && latter.length) {
former[0] > latter[0]
? result.push(latter.shift())
: result.push(former.shift());
}
if (former.length) result.push(...former);
if (latter.length) result.push(...latter);
return result;
};
const result = solution([1, 3, 5], [2, 3, 6, 7, 9]);
console.log(result);