在 Javascript 中将浮点数转换为时间

Question

我有一个三个 String 或 Float 值，比如 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）后来想减去并得到剩余小时= Total_hour-Paid_Hour-Extra_hour

后来的答案 Remaining Hour 应该是浮动的

Answer 1

这应该有效。

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)))

Answer 2

首先以分钟为单位转换数字，然后进行减法。 然后将您的输出转换为小时。

 var Total_hour = '9.30', Paid_hour = '8.00', Extra_hour = '0.40'; var conversionInMinutes = hour => Math.floor(hour) * 60 + (hour - (Math.floor(hour))) * 100; var conversionInHours = min => Math.floor( min/60 ) + min % 60 / 100; var Remaining_hour = conversionInMinutes(Total_hour) - conversionInMinutes(Paid_hour) - conversionInMinutes(Extra_hour); console.log(conversionInHours(Remaining_hour).toFixed(2));

Answer 3

以下 javascript 代码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 ? '' : '-';

    // Concate hours and minutes
    time = sign + hour + ':' + minute;

    return time;
}

console.log(convertNumToTime(11.15));

输出

11:09

Answer 4

function doTime(input)
{
    input = input.toString()
    inputs = input.split(".")
    return (inputs[0] + "Hour and" + inputs[1] + "minutes")

}

doTime("9:22")

函数减法2

function subtract2(a , b){
     a = input.toString()
     arrayA = input.split(".")
     b = input.toString()
     arrayB = input.split(".")
     h = parseInt(arrayB[0]) - parseInt(arrayA[0])
     h <0 ? h+=12/*or 24*/ :h=h
     m = parseInt(arrayB[1]) - parseInt(arrayA[1])
     if(m<0){h-- ; m+=60}
     return h.toString() + ":" + m.toString()
}