diff --git a/src/Db/OdbcResultSet.php b/src/Db/OdbcResultSet.php
index a622632..a05e47a 100644
--- a/src/Db/OdbcResultSet.php
+++ b/src/Db/OdbcResultSet.php
@@ -25,10 +25,6 @@ class OdbcResultSet implements \Iterator, \ArrayAccess, \Countable
         return $this->num_rows;
     }
 
-    public function count() {
-        return $this->get_num_rows();
-    }
-
     public function is_error()
     {
         return ($this->error ? true : false);
@@ -49,78 +45,55 @@ class OdbcResultSet implements \Iterator, \ArrayAccess, \Countable
         return $this->results;
     }
 
-    // ArrayAccess
-    /**
-     * @param int $offset
-     * @return bool
-     */
-    public function offsetExists($offset)
-    {
-        return !$this->error && $this->cursor_index < $this->length && $this->cursor_index >= 0;
+    // Implementing Countable
+    public function count(): int {
+        return $this->get_num_rows();
     }
 
-    /**
-     * @param int $offset
-     * @return bool|array
-     */
-    public function offsetGet($offset)
+    // Implementing ArrayAccess
+    public function offsetExists(mixed $offset): bool
+    {
+        return !$this->error && $offset < $this->length && $offset >= 0;
+    }
+
+    public function offsetGet(mixed $offset): mixed
     {
         return $this->offsetExists($offset) ? $this->results[$offset] : false;
     }
 
-    public function offsetSet($offset, $value)
+    public function offsetSet(mixed $offset, mixed $value): void
     {
         if($this->offsetExists($offset)) {
             $this->results[$offset] = $value;
         }
     }
 
-    public function offsetUnset($offset)
+    public function offsetUnset(mixed $offset): void
     {
-        throw new \RuntimeException("This makes no sense at all.");
+        throw new \RuntimeException("Unsetting elements is not supported.");
     }
 
-    // Iterator
-     /**
-     * Return the current element
-     * @return mixed
-     */
-    public function current()
+    // Implementing Iterator
+    public function current(): mixed
     {
         return $this->offsetGet($this->cursor_index);
     }
 
-    /**
-     * Return the key of the current element
-     * @return mixed
-     */
     public function key(): mixed
     {
         return $this->cursor_index;
     }
 
-    /**
-     * Move forward to next element
-     * @return void
-     */
     public function next(): void
     {
         ++$this->cursor_index;
     }
 
-    /**
-     * Rewind the Iterator to the first element
-     * @return void
-     */
     public function rewind(): void
     {
         $this->cursor_index = 0;
     }
 
-    /**
-     * Checks if current position is valid
-     * @return bool
-     */
     public function valid(): bool
     {
         return $this->offsetExists($this->cursor_index);