Here s a list of coding puzzle websites. Are there any other good sites (or books/videos/courses) that people know of?
- Code Wars
- Project ideas
- Project Ideas
- Competitive Programming Problems
- Coder Byte
- 99 Lisp Problems
- 99 Haskell Problems
- Boston Python Coding Puzzles
- Interview Cake
- Exercism.io
- Code Golf
- Talent Buddy
- Hacker Rank
- Project Euler
- Quora question on programming puzzles
- i-programmer Puzzles
- Coding Bat
- Python Challenge
- 21 Essential JS Tech Interview Practice Questions
- Career Cup
- Codility
- Code Eval
- Code Chef
- Code Forces
- UVA Online Judge
- Sphere Online Judge
- Top Coder
- Code Golf on StackExchange
- Advent of Code
There are other lists on Stack Exchange and Six Revisions.