Thank you for creating CodePen. Others have mentioned, it already but I feel like I must echo the same sentiment. I finished a 4 years CS degree years ago and

Thank you for creating CodePen. Others have mentioned, it already but I feel like I must echo the same sentiment. I finished a 4 years CS degree years ago and I can honestly say that throughout my career I never had to create a linked list by hand. Quiet frankly, knowing how to implement a heap with your eyes closed doesn't mean anything. Running a successful SAAS for many years and scaling it on the other hand, is far more of an impressive accomplishment. Kudos to you.