Improve searching for active entities. Also fix a possible crash because the entity instance pushed on the stack was appending to itself instead of the array.

source/Base/Algo.cpp

@@ -0,0 +1,8 @@
+// ------------------------------------------------------------------------------------------------
+#include "Base/Algo.hpp"
+
+// ------------------------------------------------------------------------------------------------
+namespace SqMod {
+
+
+} // Namespace:: SqMod

source/Base/Algo.hpp

@@ -0,0 +1,29 @@
+#ifndef _BASE_ALGO_HPP_
+#define _BASE_ALGO_HPP_
+
+// ------------------------------------------------------------------------------------------------
+#include <SqBase.hpp>
+
+// ------------------------------------------------------------------------------------------------
+namespace SqMod {
+namespace Algo {
+
+/* ------------------------------------------------------------------------------------------------
+ * Collect all elements within the specified range that the inspector deems worthy.
+*/
+template < typename Iterator, typename Inspector, typename Collector >
+void Collect(Iterator first, Iterator last, Inspector inspect, Collector collect)
+{
+    for (; first != last; ++first)
+    {
+        if (inspect(*first))
+        {
+            collect(*first);
+        }
+    }
+}
+
+} // Namespace:: Algo
+} // Namespace:: SqMod
+
+#endif // _BASE_ALGO_HPP_