Generate array of times (as strings) for every X minutes in JavaScript

Question

I\'m trying to create an array of times (strings, not Date objects) for every X minutes throughout a full 24 hours. For example, for a 5 minute interval the arr

Answer 1

In any case you need to do O(N) operations to enumerate array elements. However, you could iterate through Date objects itself.

function timeArr(interval) //required function with custom MINUTES interval
{
  var result = [];
  var start = new Date(1,1,1,0,0);
  var end = new Date(1,1,2,0,0);
  for (var d = start; d < end; d.setMinutes(d.getMinutes() + 5)) {
      result.push(format(d));
  }

  return result;
}

function format(inputDate) // auxiliary function to format Date object
{
    var hours = inputDate.getHours();
    var minutes = inputDate.getMinutes();
    var ampm = hours < 12? "AM" : (hours=hours%12,"PM");
    hours = hours == 0? 12 : hours < 10? ("0" + hours) : hours;
    minutes = minutes < 10 ? ("0" + minutes) : minutes;
    return hours + ":" + minutes + " " + ampm;
}

Demo