javascript - 我应该如何将输出从分钟转换为 HH :MM format?

Question

代码很简单，我对编程很陌生。你输入你需要的分数和游戏的结果，输出就是分数所需的游戏时间。
它有效，我的问题是我应该如何将输出转换为 HH:MM 格式？我尝试了 if/else 循环，但工作量很大，更不用说它非常原始和硬编码。循环是答案吗？我应该从头开始吗？
先感谢您!

function passPoints(input) {
    let gameResult = String(input[0]);
    let pointsNeeded = Number(input[1]);

    let pointsPerMinute = 0;

    if (gameResult == 'w') {
        pointsPerMinute = 6;
    } else if (gameResult == 'l') {
        pointsPerMinute = 4;
    }

    let minutesOfGameplayNeeded = pointsNeeded / pointsPerMinute;


    console.log(minutesOfGameplayNeeded)
}

Answer 1

这是我将如何处理它。使用模数除以 60 得到 h:m

// as a helper function
const getTimeReadout = m => {
  let a = [Math.floor(m / 60), Math.floor(m % 60)]
  return a.map(t => ('0' + t).slice(-2)).join(':')
}

在这里，它被集成到您的代码中:

function passPoints(input) {
  let gameResult = String(input[0]);
  let pointsNeeded = Number(input[1]);

  let pointsPerMinute = 0;

  if (gameResult == 'w') {
    pointsPerMinute = 6;
  } else if (gameResult == 'l') {
    pointsPerMinute = 4;
  }

  let m = pointsNeeded / pointsPerMinute
  let minutesOfGameplayNeeded = [Math.floor(m / 60), Math.floor(m % 60)];
  // now it's in an array so we can iterate it below (adding the zero if needed)
  minutesOfGameplayNeeded = minutesOfGameplayNeeded.map(t => ('0' + t).slice(-2)).join(':')

  console.log(minutesOfGameplayNeeded)
}

passPoints(['w', 427]);

同样的事情，但我稍微优化了你的代码:

function passPoints(input) {
  [gameResult, pointsNeeded] = input
  let pointsPerMinute = gameResult == 'w' ? 6 : gameResult == 'l' ? 4 : 0;
  let m = pointsNeeded / +pointsPerMinute;
  return [Math.floor(m / 60), Math.floor(m % 60)].map(t => ('0' + t).slice(-2)).join(':')
}
console.log(passPoints(['w', 427]));