code fixes

Algorithm/Graph/MarkovChain.php

@@ -177,7 +177,7 @@ final class MarkovChain
 
         $prob = 1.0;
         for ($i = $this->order; $i < $length; ++$i) {
-            $prob *= $this->data[\implode($key)][$path[$i]] ?? 0.0;
+            $prob *= $this->data[\implode(' ', $key)][$path[$i]] ?? 0.0;
 
             $key[] = $path[$i];
             \array_shift($key);

DataStorage/Database/Mapper/ReadMapper.php

@@ -433,7 +433,7 @@ final class ReadMapper extends DataMapperAbstract
         $query = $this->getQuery(
             null,
             [
-                'COUNT(' . (empty($this->columns) ? '*' : \implode($this->columns)) . ')' => 'count'
+                'COUNT(' . (empty($this->columns) ? '*' : \implode(',', $this->columns)) . ')' => 'count',
             ]
         );
 
@@ -452,7 +452,7 @@ final class ReadMapper extends DataMapperAbstract
         $query = $this->getQuery(
             null,
             [
-                'SUM(' . (empty($this->columns) ? '*' : \implode($this->columns)) . ')' => 'sum'
+                'SUM(' . (empty($this->columns) ? '*' : \implode(',', $this->columns)) . ')' => 'sum',
             ]
         );
 

Math/Geometry/ConvexHull/GrahamScan.php

@@ -70,7 +70,7 @@ final class GrahamScan
         $subpoints = \array_slice($points, 2, $count);
         \usort($subpoints, function (array $a, array $b) use ($c) : int {
             // @todo: Might be wrong order of comparison
-            return \atan2($a['y'] - $c['y'], $a['x'] - $c['x']) <=> \atan2( $b['y'] -  $c['y'],  $b['x'] - $c['x']);
+            return \atan2($a['y'] - $c['y'], $a['x'] - $c['x']) <=> \atan2($b['y'] - $c['y'],  $b['x'] - $c['x']);
         });
 
         /** @var array<int, array{x:int|float, y:int|float}> $points */
@@ -106,9 +106,9 @@ final class GrahamScan
     /**
      * Counterclockwise rotation
      *
-     * @param array<x:int|float, y:int|float> $a Vector
+     * @param array{x:int|float, y:int|float} $a Vector
-     * @param array<x:int|float, y:int|float> $b Vector
+     * @param array{x:int|float, y:int|float} $b Vector
-     * @param array<x:int|float, y:int|float> $c Vector
+     * @param array{x:int|float, y:int|float} $c Vector
      *
      * @return int|float
      *

Math/Optimization/Simplex.php

@@ -26,6 +26,7 @@ namespace phpOMS\Math\Optimization;
 class Simplex
 {
     private int $m = 0;
+
     private int $n = 0;
 
     private array $A = [];
@@ -40,7 +41,7 @@ class Simplex
 
     private array $Nonbasic = [];
 
-    private function pivot (int $x, int $y)
+    private function pivot (int $x, int $y) : void
     {
         for ($j = 0; $j < $this->n; ++$j) {
             if ($j !== $y) {

Stdlib/Tree/BinarySearchTree.php

@@ -185,7 +185,7 @@ class BinarySearchTree
 
             if ($comparison < 0) {
                 if ($current->left === null) {
-                    $BST         = new BinarySearchTree();
+                    $BST         = new self();
                     $new         = new Node($node->key, $node->data);
                     $new->parent = $current;
                     $new->tree   = $BST;
@@ -197,7 +197,7 @@ class BinarySearchTree
                 }
             } elseif ($comparison > 0) {
                 if ($current->right === null) {
-                    $BST         = new BinarySearchTree();
+                    $BST         = new self();
                     $new         = new Node($node->key, $node->data);
                     $new->parent = $current;
                     $new->tree   = $BST;

tests/Utils/IO/Spreadsheet/SpreadsheetDatabaseMapperTest.php

@@ -14,9 +14,9 @@ declare(strict_types=1);
 
 namespace phpOMS\tests\Utils\IO\Spreadsheet;
 
-use phpOMS\tests\Autoloader;
 use phpOMS\DataStorage\Database\Connection\SQLiteConnection;
 use phpOMS\DataStorage\Database\Query\Builder;
+use phpOMS\tests\Autoloader;
 use phpOMS\Utils\IO\Spreadsheet\SpreadsheetDatabaseMapper;
 use phpOMS\Utils\StringUtils;