Function change

javascript/0518-coin-change-ii.js:8–16

(amount, coins, n = coins.length)

 * @return {number}
 */
var change = (amount, coins, n = coins.length) => {
    const isBaseCase1 = amount === 0;
    if (isBaseCase1) return 1;

    const isBaseCase2 = n === 0;
    if (isBaseCase2) return 0;

    return dfs(amount, coins, n); /* Time O(2^N) | Space O(N) */
};

var dfs = (amount, coins, n) => {
    const isLess = amount < coins[n - 1];