Done

index.js

@@ -0,0 +1,21 @@
+var recipes = {key : "value"}
+
+function updateObjectWithKeyAndValue(object, key, value){
+  return Object.assign({recipes}, object, {[key] : value})
+}
+
+function destructivelyUpdateObjectWithKeyAndValue(object, key, value){
+  object[key] = value;
+  return object;
+}
+
+function deleteFromObjectByKey(object, key){
+   var newObject = Object.assign({}, object);
+   delete newObject[key];
+  return newObject;
+}
+
+function destructivelyDeleteFromObjectByKey(object, key){
+  delete object[key]
+  return object
+}