在javascript中将军事时间转换为标准时间的最佳方法 [英] Best way to convert military time to standard time in javascript

问题描述

将军事时间转换为上午和下午时间的最佳方式是什么？ 。
我有以下代码并且工作正常：

What is the best way to convert military time to am and pm time. . I have the following code and it works fine:

$scope.convertTimeAMPM = function(time){
//var time = "12:23:39";
var time = time.split(':');
var hours = time[0];
var minutes = time[1];
var seconds = time[2];
$scope.timeValue = "" + ((hours >12) ? hours -12 :hours);
    $scope.timeValue += (minutes < 10) ? ":0" : ":" + minutes;
    $scope.timeValue += (seconds < 10) ? ":0" : ":" + seconds;
    $scope.timeValue += (hours >= 12) ? " P.M." : " A.M.";
    //console.log( timeValue);
}

但是当我运行程序时，我对输出节目不满意。 。

But I am not satisfied in the output shows when I run my program. .

样本输出：

20:00:00   8:0:0 P.M.
08:00:00   08:0:0 A.M
16:00:00   4:30:0 P.M.

我想实现如下输出：

20:00:00   8:00:00 P.M.
08:00:00   8:00:00 A.M
16:30:00   4:30:00 P.M.

那里有什么建议吗？谢谢

Is there any suggestions there? Thanks

推荐答案

当分钟<时，你错过了连接字符串10 和秒< 10 所以你没有得到理想的结果。

You missed concatenating the string when minutes < 10 and seconds < 10 so you were not getting the desired result.

使用 Number（）并正确使用它，如下面的工作代码段所示：

Convert string to number using Number() and use it appropriately as shown in the working code snippet below:

编辑：更新后的代码 Number（）声明小时，分钟和秒。

Updated code to use Number() while declaration of hours, minutes and seconds.

var time = "16:30:00"; // your input

time = time.split(':'); // convert to array

// fetch
var hours = Number(time[0]);
var minutes = Number(time[1]);
var seconds = Number(time[2]);

// calculate
var timeValue;

if (hours > 0 && hours <= 12) {
  timeValue= "" + hours;
} else if (hours > 12) {
  timeValue= "" + (hours - 12);
} else if (hours == 0) {
  timeValue= "12";
}
 
timeValue += (minutes < 10) ? ":0" + minutes : ":" + minutes;  // get minutes
timeValue += (seconds < 10) ? ":0" + seconds : ":" + seconds;  // get seconds
timeValue += (hours >= 12) ? " P.M." : " A.M.";  // get AM/PM

// show
alert(timeValue);
console.log(timeValue);

阅读： Number（） | MDN

Read up: Number() | MDN

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