如何在javascript中將值轉換爲hr：mn：sc格式

Question

我想在下面的代碼中將album.songs[i].duration的值轉換，以便它顯示hr：mn：sc而不是其存儲的格式，即秒。我可以在這行代碼中執行此操作嗎？

var $newRow = createSongRow(i + 1, album.songs[i].title, album.songs[i].duration);

Answer 1

這是基本的數學...

function convert(s) { 
 
    var hr = (Math.floor(s/3600)); 
 
    var mn = (Math.floor(s % 3600/60)); 
 
    var sc = (Math.floor(s % 60)); 
 
    
 
    return hr +":"+ mn +":"+ sc; 
 
} 
 

 

 
/* for example */ 
 
var seconds = 345432; 
 
console.log(convert(seconds));

Answer 2

考慮到要在人力資源的格式轉換的持續時間（秒）：MN：SC ，我們可以按照下面的方法在香草中javascript：

var duration = 5000; // seconds 
var hour = parseInt(duration/3600); // as 1 hour = 3600 seconds 
var minutes = parseInt((duration - (hour * 3600))/60); // as 1 minute = 60 seconds 
var seconds = duration - (hour * 3600) - (minutes * 60); 
var durationStr = hour + ':' + minutes + ':' + seconds; 
console.log(durationStr); // should print 1:23:20 

Answer 3

擴展在Hearner的答案，用填充分鐘和秒鐘< 10：

function pad(num) { 
 
    if (num < 10) return '0' + num; 
 
    return num; 
 
} 
 

 

 
function convert(s) { 
 
    var hr = (Math.floor(s/3600)); 
 
    var mn = pad(Math.floor(s % 3600/60)); 
 
    var sc = pad(Math.floor(s % 60)); 
 
    
 
    return hr +":"+ mn +":"+ sc; 
 
} 
 

 

 
/* for example */ 
 
var seconds = 3661; 
 
console.log(convert(seconds)); // 1:01:01 instead of 1:1:1 
 

 
// and you would use: 
 
// var $newRow = createSongRow(i + 1, album.songs[i].title, convert(album.songs[i].duration));