feat(contains): create exercise

14_contains/solution/contains-solution.js

@@ -1,19 +1,22 @@
-const contains = function (obj, searchValue) {
-  const values = Object.values(obj);
+const contains = function (initialObject, searchValue, queue = []) {
+  if (initialObject !== null) queue.push(initialObject);
+  if (initialObject === null && queue.length === 0) return false;
+  const item = queue.shift();
+  const values = Object.values(item);
 
   // NaN === NaN evaluates to false
   // Normally, we would have to do an explicit Number.isNaN() check to compare NaN equality
   // However, Array.prototype.includes automatically handles this for us
   if (values.includes(searchValue)) return true;
 
   const nestedObjects = values.filter(
+    // typeof null === 'object' evaluates to true ¯\_(ツ)_/¯
     (value) => typeof value === "object" && value !== null,
   );
-  for (const nestedObject of nestedObjects) {
-    return contains(nestedObject, searchValue);
-  }
 
-  return false;
+  const newQueue = queue.concat(nestedObjects);
+
+  return contains(null, searchValue, newQueue);
 };
 
 // Do not edit below this line