CodeWars
Codewars is a platform where you can practice your coding skills by attempting various problems in the languages of your choice. You will be given prompts with varying difficulties, and the way that you “solve” them is by passing all the pre-defined tests.
https://www.youtube.com/watch?v=XtdQv1-tN18
Codewars is a collective effort by its users. They are creators—authoring kata to teach various techniques, solving kata with solutions that enlighten others, and commenting with constructive feedback.
