best practice

teamtnt · Apr 27, 2016 · 951cf01 · 951cf01
1 parent fe074e4
commit 951cf01
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Support/Expression.php b/src/Support/Expression.php
@@ -37,7 +37,7 @@ public function toPostfix($exp)
                 }
             }
         }
-        while ($stack) {
+        while (!empty($stack)) {
             $postfix[] = array_pop($stack);
         }