Question

i have an if statement to change time back to 12 after it hits 11:45:

        i = (i >= 192) ? i - 192 : ( i >= 96) ? i - 96 : i
        var mins = (i * 15 % 60)
        var hours = Math.floor(i * 15 / 60)
        var ampm = (hours >= 12) ? "PM" : "AM"


        hours = (hours == 0) ? 12 : (hours >= 12) ? hours - 12 : hours;


        var nextMins, nextHours = hours;
        switch (mins) {
            case 0:
                mins = "";
                nextMins = 15;
                break;
            case 45:
                nextMins = "";
                nextHours = hours+1;
                break;
            default:
                nextMins = mins + 15;
                break;

        }

        var time = hours + (mins == "" ? "" : ":" + mins) + " - " + nextHours + (nextMins == "" ? "" : ":" + nextMins) + ampm

it changes in 15 minute intervals, the issue is it will start at 12 but after it gets to 12:00 again it will display as 0:15, 0:30, 0:45. Instead of 12:15, 12:30, 12:45

I thought this part of the if statement would do it:

hours = (hours == 0) ? 12

but isn’t working?

Answer 1

The simplest way is probably

hours = (hours % 12) || 12;

This way copes with any positive integer for hours (eg. 36 will still return 12).