diff --git a/guide/english/certifications/front-end-libraries/redux/use-the-spread-operator-on-arrays/index.md b/guide/english/certifications/front-end-libraries/redux/use-the-spread-operator-on-arrays/index.md
index da448c5380..79af8c61b6 100644
--- a/guide/english/certifications/front-end-libraries/redux/use-the-spread-operator-on-arrays/index.md
+++ b/guide/english/certifications/front-end-libraries/redux/use-the-spread-operator-on-arrays/index.md
@@ -2,9 +2,30 @@
 title: Use the Spread Operator on Arrays
 ---
 ## Use the Spread Operator on Arrays
-
-This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/certifications/front-end-libraries/redux/use-the-spread-operator-on-arrays/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
-
-<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
-
 <!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
+
+
+## Solution
+
+```javascript
+const immutableReducer = (state = ['Do not mutate state!'], action) => {
+  switch(action.type) {
+    case 'ADD_TO_DO':
+      // don't mutate state here or the tests will fail
+      let arr = [...state];
+      arr.push(action.todo);
+      return arr;
+    default:
+      return state;
+  }
+};
+
+const addToDo = (todo) => {
+  return {
+    type: 'ADD_TO_DO',
+    todo
+  }
+}
+
+const store = Redux.createStore(immutableReducer);
+```