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83 private links
83 private links
- Rosetta Code -- Code Problem repository; from simple to hard with solutions for many languages
- Project Euler -- Code Problem repository; generally a bit harder, more algorithm-focused than Rosetta
- Exercism -- mentor-based code exercises. You send in problem solutions via cli, and a mentor can check them and give tips to you. FOSS
- CodeWars -- 'compete' against others in exercises; you send in solutions and people can vote on how successful (or elegant) your solution is