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Moving to RnG

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This commit is contained in:
Dennis Eichhorn 2016-03-14 14:22:24 +01:00
parent 78bc28b045
commit 776717ad53
2 changed files with 0 additions and 47 deletions
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30
Utils/Random/ArrayRandomize.php
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@ -1,30 +0,0 @@
<?php
class ArrayRandomize
{
public static function yates($arr) : array
{
$shuffled = [];
while($arr){
$rnd = array_rand($arr);
$shuffled[] = $arr[$rnd];
array_splice($arr, $rnd, 1);
}
return $shuffled;
}
public static function knuth($arr) : array
{
$shuffled = [];
for($i = count($arr)-1; $i > 0; $i--){
$rnd = mt_rand(0, $i);
$shuffled[$i] = $arr[$rnd];
$shuffled[$rand] = $arr[$i];
}
return $shuffled;
}
}

17
Utils/Random/LinearCongruentialGenerator.php
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<?php
class LinearCongruentialGenerator
{
public static function bsd(int $seed)
{
return function() use(&$seed) {
return $seed = (1103515245 * $seed + 12345) % (1 << 31);
}
}
public static function msvcrt(int $seed) {
return function() use (&$seed) {
return ($seed = (214013 * $seed + 2531011) % (1 << 31)) >> 16;
};
}
}