在JavaScript中每X分钟生成一次时间数组(作为字符串) [英] Generate array of times (as strings) for every X minutes in JavaScript

问题描述

我试图在整个24小时内每X分钟创建一次时间数组(字符串，不是Date对象).例如，对于5分钟的时间间隔，数组将为:

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 array would be:

['12:00 AM', '12:05 AM', '12:10 AM', '12:15 AM', ..., '11:55 PM']

我快速而又肮脏的解决方案是使用3个嵌套的for循环:

My quick and dirty solution was to use 3 nested for loops:

var times = []
  , periods = ['AM', 'PM']
  , hours = [12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
  , prop = null
  , hour = null
  , min = null; 

for (prop in periods) {
  for (hour in hours) {
    for (min = 0; min < 60; min += 5) {
      times.push(('0' + hours[hour]).slice(-2) + ':' + ('0' + min).slice(-2) + " " + periods[prop]);
    }
  }
}

这将输出所需的结果，但我想知道是否有更优雅的解决方案.有没有办法做到这一点:

This outputs the desired result but I'm wondering if there's a more elegant solution. Is there a way to do this that's:

• 更具可读性
• 时间复杂度低

推荐答案

如果仅以分钟为单位设置间隔[0-60]，则不创建日期对象并在单循环中评估以下解决方案:

If the interval is only to be set in minutes[0-60], then evaluate the below solution w/o creating the date object and in single loop:

var x = 5; //minutes interval
var times = []; // time array
var tt = 0; // start time
var ap = ['AM', 'PM']; // AM-PM

//loop to increment the time and push results in array
for (var i=0;tt<24*60; i++) {
  var hh = Math.floor(tt/60); // getting hours of day in 0-24 format
  var mm = (tt%60); // getting minutes of the hour in 0-55 format
  times[i] = ("0" + (hh % 12)).slice(-2) + ':' + ("0" + mm).slice(-2) + ap[Math.floor(hh/12)]; // pushing data in array in [00:00 - 12:00 AM/PM format]
  tt = tt + x;
}

console.log(times);

这篇关于在JavaScript中每X分钟生成一次时间数组(作为字符串)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！