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Функция случайности с приоритетом
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| <?php | |
| /* | |
| Функция случайности с приоритетом | |
| @author Dmitriy Nyashkin | |
| @param (array) arr - Array with priority key | |
| @param (string) priority_key - Array key for use priority | |
| @return array - single array | |
| */ | |
| function random_priority($arr, $priority_key = 'priority') | |
| { | |
| $keys = array(); | |
| foreach($arr as $key=>$val) | |
| $keys = array_merge($keys, array_fill(0, intval($val[$priority_key]), $key)); | |
| return $arr[ $keys[ array_rand($keys) ] ]; | |
| } | |
| ?> |
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| <pre> | |
| <?php | |
| $arr = array( | |
| array("name" => "мусор", "priority" => 1), | |
| array("name" => "среднее", "priority" => 2), | |
| array("name" => "хорошее", "priority" => 3), | |
| array("name" => "элита", "priority" => 4), | |
| ); | |
| $arr2 = array(); | |
| for ($i=1; $i <= 10; $i++) { | |
| $arr2[]=array("name" => "$i", "priority" => random_int(1, 100)); | |
| } | |
| function convert($size) | |
| { | |
| $unit=array('b','kb','mb','gb','tb','pb'); | |
| return round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i]; | |
| } | |
| /* | |
| Функция случайности с приоритетом | |
| @author Dmitriy Nyashkin | |
| @param (array) arr - Array with priority key | |
| @param (string) priority_key - Array key for use priority | |
| @return array - single array | |
| */ | |
| function random_priority($arr, $priority_key = 'priority') | |
| { | |
| $keys = array(); | |
| foreach($arr as $key=>$val) | |
| $keys = array_merge($keys, array_fill(0, intval($val[$priority_key]), $key)); | |
| return $arr[ $keys[ array_rand($keys) ] ]; | |
| } | |
| $time = -microtime(true); | |
| // тестирование работы | |
| echo '<h3>test 1</h3>'; | |
| $win_items = []; // массив побед | |
| $inter = 100000; // число интераций теста (чем больше тем точнее) | |
| for ($i=0; $i < $inter; $i++) { | |
| $win = random_priority($arr)['name']; | |
| if(isset($win_items[$win])) | |
| $win_items[$win]++; | |
| else | |
| $win_items[$win] = 1; | |
| } | |
| ksort($win_items); | |
| $total = 0; | |
| foreach($win_items as $name => $count) | |
| { | |
| $total += ($count / $inter * 100); | |
| echo $name . " " . ($count / $inter * 100). ' %' . PHP_EOL; | |
| } | |
| echo "<hr>Total $total%<br>"; | |
| $time += microtime(true); | |
| $time2 = -microtime(true); | |
| echo "Time: ",sprintf('%f', $time) . 's' . PHP_EOL; | |
| echo 'Usage: '. convert(memory_get_usage(true)); // 123 kb | |
| // тестирование работы | |
| echo '<h3>test 2</h3>'; | |
| $win_items = []; // массив побед | |
| $inter = 10000; // число интераций теста (чем больше тем точнее) | |
| for ($i=0; $i < $inter; $i++) { | |
| $win = random_priority($arr2)['name']; | |
| if(isset($win_items[$win])) | |
| $win_items[$win]++; | |
| else | |
| $win_items[$win] = 1; | |
| } | |
| ksort($win_items); | |
| $total = 0; | |
| foreach($win_items as $name => $count) | |
| { | |
| $total += ($count / $inter * 100); | |
| echo $name . " - " . ($count / $inter * 100). ' %' . PHP_EOL; | |
| } | |
| echo "<hr>Total $total%<br>"; | |
| $time2 += microtime(true); | |
| echo "Time: ",sprintf('%f', $time2) . 's' . PHP_EOL; | |
| echo 'Usage: '. convert(memory_get_usage(true)); | |
| ?> | |
| </pre> |
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