Fixed syntax bug (hopefully).

app/Http/Controllers/ResultController.php

@@ -21,7 +21,7 @@ class ResultController extends Controller
      *
      * Needed to avoid including the 'data' field, which can get very large.
      */
-    private rowsForIndex = [
+    const ROWS_FOR_INDEX = [
         "id",
         "experiment",
         "created_at",
@@ -35,7 +35,7 @@ class ResultController extends Controller
      * @return \Illuminate\Http\Response
      */
     public function index() {
-        $results = Result::select($this->rowsForIndex)
+        $results = Result::select(self::ROWS_FOR_INDEX)
             ->where('partial', false)
             ->get();
 
@@ -43,7 +43,7 @@ class ResultController extends Controller
     }
 
     public function indexPartial() {
-        $results = Result::select($this->rowsForIndex)
+        $results = Result::select(self::ROWS_FOR_INDEX)
             ->where('partial', true)
             ->get();