Clean up dead code for depth first search

Author: clue

src/Search/DepthFirst.php

@@ -2,40 +2,19 @@
 
 namespace Graphp\Algorithms\Search;
 
-use Fhaculty\Graph\Vertex;
 use Fhaculty\Graph\Set\Vertices;
 
 class DepthFirst extends Base
 {
     /**
+     * calculates an iterative depth-first search
      *
-     * calculates the recursive algorithm
-     *
-     * fills $this->visitedVertices
-     *
-     * @param Vertex $vertex
+     * @return Vertices
      */
-    private function recursiveDepthFirstSearch(Vertex $vertex, array & $visitedVertices)
-    {
-        // If I didn't visited this vertex before
-        if (!isset($visitedVertices[$vertex->getId()])) {
-            // Add Vertex to already visited vertices
-            $visitedVertices[$vertex->getId()] = $vertex;
-
-            // Get next vertices
-            $nextVertices = $vertex->getVerticesEdgeTo();
-
-            foreach ($nextVertices as $nextVertix) {
-                // recursive call for next vertices
-                $this->recursiveDepthFirstSearch($nextVertix, $visitedVertices);
-            }
-        }
-    }
-
-    private function iterativeDepthFirstSearch(Vertex $vertex)
+    public function getVertices()
     {
         $visited = array();
-        $todo = array($vertex);
+        $todo = array($this->vertex);
         while ($vertex = array_shift($todo)) {
             if (!isset($visited[$vertex->getId()])) {
                 $visited[$vertex->getId()] = $vertex;
@@ -48,19 +27,4 @@ private function iterativeDepthFirstSearch(Vertex $vertex)
 
         return new Vertices($visited);
     }
-
-    /**
-     * calculates a recursive depth-first search
-     *
-     * @return Vertices
-     */
-    public function getVertices()
-    {
-        return $this->iterativeDepthFirstSearch($this->vertex);
-
-        $visitedVertices = array();
-        $this->recursiveDepthFirstSearch($this->vertex, $visitedVertices);
-
-        return $visitedVertices;
-    }
 }