chore(totalIntegers): move helper function outside to prevent it being recreated

Author: nik-rev

15_totalIntegers/solution/totalIntegers-solution.js

@@ -1,6 +1,8 @@
+// We could define this helper function inside of totalIntegers however that would not be best practice as everytime that the recursive totalIntegers is run it would re-create the isObject function when it could just re-use it.
+const isObject = (value) => typeof value === 'object' && value !== null;
+
 const totalIntegers = function (obj) {
   let count = 0;
-  const isObject = (value) => typeof value === 'object' && value !== null;
 
   if (typeof obj !== 'object' || obj === null) {
     return;