This Lesson is for PRO Members.

Subscribe today and get access to all lessons! Plus direct HD download
for offline use, member comment forums, and iTunes "podcast" RSS feed.
Level up your skills now!

UNLOCK THIS LESSON

Already subscribed? Sign In

HIDE PLAYLIST

Update Data in a List without Mutations


We’ll build small, focused functions to select an object from a list, apply updates to an object and replace an item in a list, avoid mutations to those objects along the way by returning new items that reflect our changes. We’ll verify this behavior by following a test driven approach using Jest.

Please take a moment to tell your friends:

You must be a PRO Member to view code