Self Learning / browser practice
Hara Koans.
Thirty small problems. Run them entirely in your browser, keep progress locally, and sign in when you want to sync accepted source or compare approaches.
Passing is verified by your browser and reported to Learn. This is a learning record, not a competitive or tamper-resistant leaderboard.
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- 001 First value values · level 1 ○
- 002 Truth values · level 1 ○
- 003 A name values · level 1 ○
- 004 A pair collections · level 1 ○
- 005 A map collections · level 1 ○
- 006 Counting collections · level 1 ○
- 007 The second collections · level 1 ○
- 008 Joining collections · level 1 ○
- 009 Double it functions · level 1 ○
- 010 Greeting functions · level 1 ○
- 011 Absolute decisions · level 1 ○
- 012 Choose large decisions · level 1 ○
- 013 Sum sequences · level 2 ○
- 014 Only even sequences · level 2 ○
- 015 Squares sequences · level 2 ○
- 016 Reverse path sequences · level 2 ○
- 017 First three sequences · level 2 ○
- 018 Lookup maps · level 2 ○
- 019 Frequency maps · level 2 ○
- 020 Compose functions · level 2 ○
- 021 Partial left functions · level 2 ○
- 022 Factorial recursion · level 2 ○
- 023 Fibonacci recursion · level 3 ○
- 024 Flatten one level sequences · level 2 ○
- 025 Partition pairs sequences · level 3 ○
- 026 Distinct order sequences · level 3 ○
- 027 Grouping maps · level 3 ○
- 028 Threaded data forms · level 2 ○
- 029 State step state · level 3 ○
- 030 Final pipeline sequences · level 3 ○