在Javascript中将Float转换为时间

Question

我有三个字符串或浮点数值,例如9.30,8.00和0.40作为Total_hour,Paid_hour,Extra_hour

这些实际上应该是9小时30分钟,8小时0分钟,0小时40分钟.

问题1)如何将9.30转换为9小时30分钟

问题2)稍后想要减去并获得剩余小时= Total_hour-Paid_Hour-Extra_hour

之后答案剩余时间应该是浮动的

Answer 1

以下 JavaScript 代码片段将给定的浮点数转换为小时和分钟。源浮动到时间

function convertNumToTime(number) {
    // Check sign of given number
    var sign = (number >= 0) ? 1 : -1;

    // Set positive value of number of sign negative
    number = number * sign;

    // Separate the int from the decimal part
    var hour = Math.floor(number);
    var decpart = number - hour;

    var min = 1 / 60;
    // Round to nearest minute
    decpart = min * Math.round(decpart / min);

    var minute = Math.floor(decpart * 60) + '';

    // Add padding if need
    if (minute.length < 2) {
    minute = '0' + minute; 
    }

    // Add Sign in final result
    sign = sign == 1 ? '' : '-';

    // Return concated hours and minutes
    return sign + hour + ':' + minute;
}

console.log(convertNumToTime(11.15));

输出

11:09

Answer 2

这应该工作.

你只需要转换为ms:

let timefloat = 9.3;


function convertToMs(timefloat) {
  // Get the minutes portion
  let remainder = timefloat % 1;

  // Convert into ms
  let minutes = remainder * 100 * 60 * 1000;

  // Get the number of hours and convert to ms 
  let hours = (timefloat - remainder) * 60 * 60 * 1000;

  return minutes + hours;
}

// Convert back to float format
function convertToFloat(date) {
  let hours = date.getUTCHours();
  let mins = date.getUTCMinutes();
  return hours + (mins / 100);
}


// Log the result
console.log(new Date(convertToMs(9.3)).toUTCString());
console.log(new Date(convertToMs(8.0)).toUTCString());
console.log(new Date(convertToMs(9.3) - convertToMs(8.0)).toUTCString());

let diff = convertToMs(9.3) - convertToMs(8.0);
console.log(convertToFloat(new Date(diff)))