Archived cleanObj

It's essentially the same as `pick` but a lot more confusing.

snippets/cleanObj.md

@@ -1,24 +0,0 @@
-### cleanObj
-
-Removes any properties except the ones specified from a JSON object.
-
-Use `Object.keys()` method to loop over given JSON object and deleting keys that are not included in given array.
-If you pass a special key,`childIndicator`, it will search deeply apply the function to inner objects, too.
-
-```js
-const cleanObj = (obj, keysToKeep = [], childIndicator) => {
-  Object.keys(obj).forEach(key => {
-    if (key === childIndicator) {
-      cleanObj(obj[key], keysToKeep, childIndicator);
-    } else if (!keysToKeep.includes(key)) {
-      delete obj[key];
-    }
-  });
-  return obj;
-};
-```
-
-```js
-const testObj = { a: 1, b: 2, children: { a: 1, b: 2 } };
-cleanObj(testObj, ['a'], 'children'); // { a: 1, children : { a: 1}}
-```