Good problems.
Better company.
Practice JavaScript and Python with friends.
Create a private room, trade ideas, and learn together.
Your recent rooms
No rooms yet
Create a room, then send the private link to your friends.
A few ways to start
Room templatesShare an example in chat and see how your friends would tackle it.
From first attempt to working solution
Use the examples to test your code, then compare solutions.
- 01
Choose a problem
Each problem comes with examples to test your code and hints if you get stuck.
Find a problem → - 02
Invite your friends
Create a private room, share its link, and choose a study session or friendly sprint.
See how rooms work → - 03
Compare approaches
Try an approach, discuss what happened, and compare it with the editorial after you solve the problem.
Try A perfect pair →
Can you find the pair?
Find a pair that adds up to the target. Try your approach, use a hint if you get stuck, and unlock the editorial after solving.
Try A perfect pair →FROM THE BOOKSHELFSee how a join fits together.
See which rows a join keeps in Illustrated SQL, then download the sample chapter.
Look inside the book →