Compete
Hand-picked challenge sets.
The Table Never Lies
junior
Spring Boot Closes Mar 31, 2027A season of results goes in, a league table comes out. The interesting part is who is genuinely level with whom.
Nuts and Bolts
staff
Spring Boot Closes May 15, 2027A small filter language for a hardware store's stock, read exactly as written. Precedence, grouping, and saying where it went wrong.
Groundhog Day
senior
.NET Closes May 31, 2027Replay a batch of ledger events onto an account, in the order they were meant to land.
Open and Shut
junior
React (Typescript) Closes Jun 30, 2027A helpdesk queue an agent has to narrow to open or closed. The count above the list has to agree with what is under it.
Filed Under
senior
React Native Closes Apr 30, 2027Thousands of case files under sticky letter headers, a rail that jumps straight to a letter, and a filter that reflows the lot in one pass.
Measure Twice
senior
Angular Closes Jul 15, 2027A joinery cutting list where the pieces have to come out of the stock lengths actually held, once the saw kerf is taken off.