Codewars

Codewars is an online platform that offers a gamified approach to learning and practicing programming skills. It hosts a large collection of coding challenges, known as "kata," across numerous programming languages such as Python, JavaScript, Java, C++, and many more. Users, referred to as "ninjas," solve these kata to improve their coding abilities and progress through different levels.

The platform emphasizes learning through doing and problem-solving. Each kata is designed by the community and covers a wide range of difficulty levels, from beginner to advanced. Upon solving a kata, users can view and compare their solutions with those of other ninjas, fostering a collaborative learning environment where users can learn from different approaches and best practices.

Codewars uses a unique ranking system. Users earn points and advance through increasingly difficult "kyu" and "dan" ranks as they complete kata. This gamification aspect, combined with the diverse challenges, makes Codewars a popular resource for developers looking to sharpen their coding skills, prepare for technical interviews, or simply engage with programming in a fun and competitive way. The platform also allows users to create and submit their own kata, contributing to the ever-growing library of challenges.