我找到了 leettime通过twitter ，它的新奇程度让我想把它弄乱/与你们分享。令我沮丧的是，这个版本没有做秒。似乎还有一种更有效的方式来产生时间，您怎么看？

Leet Time

Now, how is this leettime calculated?

For a given humantime (e.g. 11:15 am) the value of the leettime corresponds to the number of times you have to add up 13 hours 37 minutes in order to exactly reach this time. Whenever the result overflows during the calculation (i.e. the obtained time exceeds 23:59 o'clock) you subtract 24 hours in order to stay on the clock.

Example:

The leettime of 00:00 is 0, the leettime of 13:37 is 1 and leettime 2 corresponds to 03:14 am (because 13:37 plus 13 hours 37 minutes is 03:14 o'clock).

Is there a unique leettime for every humantime during the day?

Yes! There are exactly 24*60=1440 different leettimes, each corresponds to exactly one minute in the day.

添加任何你认为会很酷的东西，我相信这个人会喜欢的。

我设置了 PHP 版本，认为它是最易访问和可移植的。 The other versions are available here.

<?php
/**
 * Converts standard time to leettime.
 * 
 * @param int h the hour in standard time
 * @param int m the minute in standard time
 * 
 * @return int the leettime or -1 if the input
 *         parameters are invalid
 */
function TimeToLeet($h, $m){
  if(!is_numeric($h) || !is_numeric($m) ||
    $h > 23 || $h < 0 || $m > 59 || $m < 0)
      return -1;

  $curm = 0;
  $curh = 0;
  $i = 0;
  while ($curm != $m || ($curh % 24) != $h){  
    if($curm < 23){
      $curh += 13;
      $curm += 37;      
    } else {
      $curh += 14;
      $curm -= 23;      
    }
    ++$i;
  }
  return $i;  
}

/**
 * Converts leettime to standard time.
 * 
 * @param int leet the time in leettime-format in the
 *        range from 0 - 1439
 * 
 * @return var an int-Array with the hours at position 0
 * and minutes at position 1 (-1 if the input parameter
 * is not in range)
 */
function LeetToTime($leet){
  if($leet > 1439 || $leet < 0) return array(-1, -1);
  $m = $leet * 37;
  $h = ($leet * 13) + ($m / 60);
  return array($h % 24, $m % 60);
}

// Demonstrate usage

$h = (int)date("G");
$m = (int)date("i");

echo date("H:i")." = ".TimeToLeet($h,$m);

echo "
";

$leettime = 999;
$result = LeetToTime($leettime);
if($result[0] == -1) echo "error";
else {
  $h = $result[0];
  $m = $result[1];
  echo $leettime." = ".($h>9?$h:"0".$h) . 
    ":".($m>9?$m:"0".$m);
}
?>

最佳答案

为了更快地从 HH:MM 转换为 Leet，请尝试模块化算法:

首先，将 13:37 转换为 mod 1440 的数字；具体来说，13*60+37 = 817

求 817 mod 1440 的倒数。结果是 913 ( stolen from Wolfram Alpha )。 913 具有 913*817 == 1 mod 1440 的性质。

或者，如果您想使用 13 分 37 秒；你会使用 mod 86400 和 817^-1 == 67153。

将您的目标时间转换为一个 mod 1440 的数字；然后乘以 913 mod 1440 得到它对应的 leet 时间。要转换回来，乘以 817。

例子:

Going from leet time to normal time (accuracy to the minute):
someLeetTime = 1337
//where 817 = 13*60 + 37 = 13:37 in minutes
timeInMinutes = someLeetTime * 817 mod 1440 = 809
hours = timeInMinutes / 60 = 13
minutes = timeInMinutes % 60 = 29

Going from normal time to leet time (accuracy to the minute):
hours = 13
minutes = 29
timeInMinutes = hours * 60 + minutes = 809
//913 = 817^-1 mod 1440
someLeetTime = timeInMinutes * 913 mod 1440 = 1337 
13:29 is 1337 leet time  

并且，秒的一种可能实现，其中 13:37 被视为 13 分 37 秒。 (技术上违反标准，但我们是 l33t，可以做到)

Going from leet time to normal time (accuracy to the second):
someLeetTime = 1337
//where 817 = 13*60 + 37 = 13:37 in seconds
timeInSeconds = someLeetTime * 817 mod 86400 = 55529
hours = timeInSeconds / 3600 = 15
minutes = (timeInSeconds % 3600) / 60 = 25
seconds = timeInSeconds % 60 = 29

1337 in the new system is 15:25:29

Going from normal time to leet time (accuracy to the second):
hours = 15
minutes = 25
seconds = 29
timeInSeconds = hours * 3600 + minutes*60 + seconds = 55529
//67153 = 817^-1 mod 86400
someLeetTime = timeInSeconds * 67153 mod 86400 = 1337 
15:25:29 is 1337 leet time  

谢谢 Crypto 和 Modular Arithmetic。

为了插入这个伟大的事业，我 build 了一个时钟! Well... 6 actually.

关于php - 有没有更快/更好的leettime方法？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/1892598/