Function initMemo

javascript/0518-coin-change-ii.js:65–68

(coins, amount)

};

var initMemo = (coins, amount) =>
    new Array(coins.length + 2)
        .fill()
        .map(() => new Array(amount + 2).fill(null));

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