javascript - 如何一次将一个元素多次添加到数组中

Question

该函数应显示某个值对应的硬币数量；即:输入 56 应显示回 [25, 25, 5, 1]。

我遇到了麻烦:1)在数组中显示2个以上的同一枚硬币(我知道下面的数学函数没有正确使用)2) 从数组中删除所有 0

感谢您的帮助。

function getCoins(){
	let coins = [25, 10, 5, 1];
	    amount = prompt ("Enter an amount to convert into coins");
	    coinAmount = "";
					

	for (i = 0; i < coins.length; i++){
		if (amount % coins[i] >= 0){ 
			coinAmount +=  coins[i] * (Math.floor (amount/coins[i])) + ","; 
			amount = amount % coins[i];  	
			console.log (coinAmount)
		} 
	} 
}
		
getCoins()

Answer 1

一种选择是push数组并使用join来显示它。

您可以将 coinAmount concat 到一个 new Array(NumberOfCouns) 并用硬币类型填充。

function getCoins() {
  let coins = [25, 10, 5, 1];
  let amount = prompt("Enter an amount to convert into coins");
  let coinAmount = [];


  for (i = 0; i < coins.length; i++) {
    if (Math.floor(amount / coins[i]) > 0) {

      coinAmount = coinAmount.concat(new Array(Math.floor(amount / coins[i])).fill(coins[i]));
      amount = amount - (Math.floor(amount / coins[i]) * coins[i]);
    }
  }

  console.log(coinAmount.join())
}

getCoins();