jquery - Calculating Military Time to Get Hours and Minutes Worked in Javascript -

i've got few day's worth of "clock in" , "clock out" entries in military (24 hour) time plain numbers.

clock in | clock out -------------------- 1020     | 1555 1116     | 1857 1049     | 1204 

i've manually figured out person has worked 14 hours , 31 minutes. have html page contains lot of these entries in class, use following code them in javascript:

$('.clockin').each(function() {clockinsum += +$(this).text()||0;}); $('.clockout').each(function() {clockoutsum += +$(this).text()||0;}); 

i'm not sure go here, or if right way start. there way javascript/jquery calculate hours , minutes worked bunch of these entries?

you need tell timedifference.

in javascript work in milliseconds, find milliseconds difference between each start , end time, compound them , use time calculate time spent:

var list = [    ["1020", "1555"],    [1116, 1857],    [1049, "1204"],  ];  /**   * difference between 2 times in milliseconds   *   * @param {(number | string)} start   * @param {(number | string)} end   * @returns {number}   */  function gettimedifference(start, end) {    var d1 = new date(0);    d1.sethours(parseint(start.tostring().substr(0, 2), 10));    d1.setminutes(parseint(start.tostring().substr(2, 2), 10));    var d2 = new date(0);    d2.sethours(parseint(end.tostring().substr(0, 2), 10));    d2.setminutes(parseint(end.tostring().substr(2, 2), 10));    return d2.gettime() - d1.gettime();  }  //figure how long guy has worked:  var compiledtime = 0;  (var index = 0; index < list.length; index++) {    compiledtime += gettimedifference(list[index][0], list[index][1]);  }  //at point "compiledtime" contains milliseconds guy has worked  //let's print nice , pretty  var compiledtimedate = new date(compiledtime);  alert("hours: " + compiledtimedate.gethours() + "\n" +    "minutes: " + compiledtimedate.getminutes() + "\n" +    "seconds: " + compiledtimedate.getseconds() + "\n" +    compiledtimedate.gethours() + ':' + compiledtimedate.getminutes() + ':' + compiledtimedate.getseconds());  //from here can use date object methods whatever