Code Execution
LearnHouse integrates with Judge0 to provide sandboxed code execution inside Code Playground blocks on Dynamic Page activities. Students can write and run code directly in the platform, and teachers can define test cases for automatic grading.
Supported Languages
The Code Playground block supports 30 languages: Python 3, JavaScript (Node), TypeScript, Java, C, C++, Rust, Go, PHP, Ruby, Kotlin, C#, Swift, Scala, Perl, R, Dart, Haskell, Lua, Elixir, Clojure, SQL, Bash, Objective-C, Pascal, Fortran, Prolog, Common Lisp, PowerShell, and Assembly (NASM).
How It Works
- A teacher inserts a Code Playground block into a Dynamic Page activity and (optionally) defines test cases as input/output pairs.
- Students write their solution in the built-in code editor embedded in the activity.
- On submission, the code is executed against all test cases in a sandboxed Judge0 environment.
- Results are reported per test case — pass/fail, execution time, and memory usage. Submissions are stored per
activity_uuid+block_id.
Code execution is surfaced as an editor block inside course content — it is not a standalone assignment task type. If you want graded code exercises, insert a Code Playground block into a Dynamic Page activity.
Test Cases
Each test case defines:
- Input — The standard input provided to the program.
- Expected Output — The output the program should produce.
The system runs the student’s code against each test case and compares the actual output to the expected output.
Code execution requires a Judge0 instance to be configured. See the Self-Hosting Configuration for setup details.
Batch Execution
For blocks with multiple test cases, the platform executes all test cases in a single batch request, providing a comprehensive results summary that shows which tests passed and which failed.
