When comparing Code Combat vs CheckiO, the Slant community recommends CheckiO for most people. In the question“What are the best coding challenge sites?” CheckiO is ranked 6th while Code Combat is ranked 12th. The most important reason people chose CheckiO is:
Users can publish their solutions for different problems and other users can review the code and give their opinions on how they would have solved the problem. Sometimes, some of the most active users get their code reviewed by Guido Van Rossum (the creator of the Python language) himself.
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Pros
Pro A fun introduction to JS syntax and logic
Code Combat teaches you JavaScript through a game. It's a fun and engaging way to learn the basics.
Pro It has the ability for teachers to manage a class
Student progress can be seen allowing teachers to let students work at their own pace and see who might need help or who is doing excellent.
Pro Community backed solution reviews
Users can publish their solutions for different problems and other users can review the code and give their opinions on how they would have solved the problem.
Sometimes, some of the most active users get their code reviewed by Guido Van Rossum (the creator of the Python language) himself.
Pro Available in multiple languages
CheckiO crowdsources translations for problems. Currently problems have been translated in 10 languages. So it's highly possible that eventually more languages will be supported.
Pro Ability to create new challenges
New missions can be created and uploaded using GitHub. After that is done, it's suggested to CheckiO and if it fills all the requirements after being reviewed by a CheckiO team member, it's pulled into the game.
Pro Challenges from GitHub, O'Reilly, Dropbox and Hubspot.
Cons
Con Only basic concepts are taught
To learn JavaScript past the basics, additional resources will be required.
Con Not for absolute beginners
CheckiO does not teach syntax, instead it teaches how to solve problems using a particular programming language therefore some basic programming knowledge is required to start.