No. 271 · September 23, 2026 · Moderate
Drop a character
Implement `DropChar<S, C>` so every occurrence of the character union `C` disappears from `S`.
01
Puzzle
Par 3Puzzle
drop-character.tsStroke 1 of 3Not run yet
Replace ??? — your solution is checked against the cases below. Tab indents; press Escape then Tab to move focus out.
Checks
3DropChar<'a-b-c', '-'>—→ 'abc'DropChar<'banana', 'a'>—→ 'bnn'DropChar<'a.b-c', '.' | '-'>—→ 'abc'
How a check is judged Exact type equality, not assignability — an intersection is not the same as the flattened object.
How everyone did
Fewer than 5 people have solved this one so far. The distribution appears once there is enough of a sample to mean anything.
Short game
Fewest charactersNo public scores yet.
02
Annotated solution
This write-up publishes 24 hours after the puzzle closes.