📅  最后修改于: 2022-03-11 15:03:25.559000             🧑  作者: Mango
function countdown(n){
if (n < 1) {
return [];
} else {
const arr = countdown(n - 1);
arr.unshift(n);
return arr;
}
}
console.log(countdown(5)); // [5, 4, 3, 2, 1]