solved reversePolishNotation

JoeKarlsson · Nov 14, 2018 · 3e7c861 · 3e7c861
1 parent 55a0dfc
commit 3e7c861
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/reversePolishNotation.js b/src/reversePolishNotation.js
@@ -56,6 +56,9 @@ const evalRPN = tokens => {
       stack.push(parseInt(result));
     }
   });
+  if (stack.length > 1) {
+    throw new Error("Invalid RPN expression");
+  }
   return stack.pop();
 };