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koans.app
Learn a programming language by fixing failing tests
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- koans.app
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- Learn a programming language by fixing failing tests, right in your browser: Clojure, Go, JavaScript, Lua, OCaml, PHP, Prolog, Python, R, Raku, Ruby, Scheme, SQL and TypeScript. Nothing to install, no account.
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Found on the public web and described automatically from its own website. Its website was last read on Friday 6 November 2026.
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