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Posted By

camdagr8 on 11/20/13

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Last Edited at 11/20/13 10:14am

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Date.lapsed(Date)

/ Published in: JavaScript
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Calculates the time in hh:mm:ss between two dates

Usage:
var past = new Date('1/1/2013');
var now = new Date();

var lapsed = past.lapsed(now);

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  1. Date.prototype.lapsed = function (now) {
  2. 	now = now || new Date();
  3.  
  4. 	var milliseconds = Math.abs(this.getTime() - now.getTime());
  5.  
  6. 	var oneHour = 3600000;
  7. 	var oneMinute = 60000;
  8. 	var oneSecond = 1000;
  9. 	var hours = 0;
  10. 	var minutes = 0;
  11. 	var result;
  12. 	var seconds = 0;
  13.  
  14. 	if (milliseconds >= oneHour) { hours = Math.floor(milliseconds / oneHour); }
  15.  
  16. 	milliseconds = hours > 0 ? (milliseconds - hours * oneHour) : milliseconds;
  17.  
  18. 	if (milliseconds >= oneMinute) { minutes = Math.floor(milliseconds / oneMinute); }
  19.  
  20. 	milliseconds = minutes > 0 ? (milliseconds - minutes * oneMinute) : milliseconds;
  21.  
  22. 	if (milliseconds >= oneSecond) { seconds = Math.floor(milliseconds / oneSecond); }
  23.  
  24. 	milliseconds = seconds > 0 ? (milliseconds - seconds * oneSecond) : milliseconds;
  25.  
  26. 	if (hours > 0) { result = (hours > 9 ? hours : "0" + hours) + ":"; }
  27. 	else { result = "00:"; }
  28.  
  29. 	if (minutes > 0) { result += (minutes > 9 ? minutes : "0" + minutes) + ":"; }
  30. 	else { result += "00:"; }
  31.  
  32. 	if (seconds > 0) { result += (seconds > 9 ? seconds : "0" + seconds); }
  33. 	else { result += "00"; }
  34.  
  35. 	return result;
  36. };

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