HourFromTime.js 387 Bytes
'use strict';

var floor = require('./floor');
var modulo = require('./modulo');

var timeConstants = require('../helpers/timeConstants');
var msPerHour = timeConstants.msPerHour;
var HoursPerDay = timeConstants.HoursPerDay;

// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.10

module.exports = function HourFromTime(t) {
	return modulo(floor(t / msPerHour), HoursPerDay);
};