View difference between Paste ID: eB3TVP1E and

-
+<?php
   // Based on code from:
   // http://stackoverflow.com/questions/14389180/algorithm-for-probability-when-looping-over-a-randomly-ordered-array
   // http://math.stackexchange.com/questions/280792/determining-probability-in-a-random-loop/280948#280948
   // -------------
 
   // Taken from php.net/shuffle user notes
   function shuffle_assoc($array) {
     $keys = array_keys($array);
     shuffle($keys);
     foreach($keys as $key) {
       $new[$key] = $array[$key];
     }
     return $new;
   }
 
   $i = 1000000; // How many tests to perform
 
   // This is my rule list.  Each key is a simple color
   // and each value is a probability represented as a percent
   $rules = array(
     'black' => 20,
     'white' => 10,
     'red' => 40,
     'green' => 5,
     'blue' => 25,
   );
 
   // Initialize the scores array with all 0's
   // The "outs" will be used when the probability does not
   // occur in any of the rules
   $scores = array('outs' => 0);
   foreach($rules as $k => $v) {
     $scores[$k] = 0;
   }
 
   $count = count($rules);
 
   for($x = 0; $x < $i; $x++) {
     $rules = shuffle_assoc($rules);
 
     $accumulated_probability = 0;
     $rand = mt_rand(1,100);
     foreach($rules as $k => $probability) {
       $actual_probability = $probability + $accumulated_probability;
       $accumulated_probability = $probability + $accumulated_probability;
 
       if($rand > $actual_probability) {
         continue;
       } else {
         $scores[$k]++;
         continue 2;
       }
     }
     $scores['outs']++;
   }
 
 
   foreach($scores as $k => $v) {
     echo "$k: " . (($v/$i)*100) . "% ($v/$i)\n";
   }
 
 ?>