Travis build: 2161

snippets/luhnCheck.md

@@ -15,7 +15,7 @@ const luhnCheck = num => {
     .reverse()
     .map(x => parseInt(x));
   let lastDigit = arr.splice(0, 1)[0];
-  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
+  let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + ((val * 2) % 9) || 9), 0);
   sum += lastDigit;
   return sum % 10 === 0;
 };