My daily-tips generated by LLM skill /daily-tips; it was originally in my
gists but wanted to share it to public for they are very good tips.
One non-obvious tip each for Rust, C++, F#, and TypeScript. Every entry names the minimum language or compiler version, cites a primary source, and closes with a question it deliberately leaves unanswered.
Not every tip was fact-checked. Most code samples were compiled and run, but not every one. Some claims rest on documentation or memory, and an entry says so where it knows. Nothing here is guaranteed. All information is provided AS-IS: take it or leave it. Do your own fact-checks before you rely on any claim.
391 tips across 44 days (2026-08-28 to 2026-11-10).
| Language | Tips | Type system | Idioms | Stdlib gems | Perf and memory | Frontier |
|---|---|---|---|---|---|---|
| Rust | 100 | 18 | 26 | 33 | 13 | 10 |
| C++ | 100 | 16 | 39 | 20 | 12 | 13 |
| F# | 91 | 14 | 28 | 24 | 17 | 8 |
| TypeScript | 100 | 15 | 37 | 29 | 7 | 12 |
ledger.jsonl is the machine-readable index: one JSON object per tip, with
date, language, category, title, tags, sources, and related.
- Rust
type-systemA closure that returns a borrow of its &str argument does not compile, and leaving out the annotation makes it compile with one lifetime for every call - C++
perf-memorylibstdc++ makes shared_ptr reference counts atomic only after the process's first thread, and never switches back - F#
frontierAsync.AwaitTask hands a failed task's error over as AggregateException, so with :? FileNotFoundException never runs, and F# 11's Async.Await is the version that does - TypeScript
stdlib-ecosystemnew URL(next_path, base) turns /\evil.example and //evil.example into another host, and both pass a starts-with-one-slash check
Also in this entry:
- The functional angle - a lambda that returns what it was given is refused in Rust, copied in C++ and shared in TypeScript
- The security angle - the code that validates a URL and the browser that follows it must use the same parser
- FAQ - 3 follow-up questions
One topic compared across all four languages, outside the daily rotation. Each link opens part 1.
- random numbers (2026-11-04, 15 parts) - a seed that promised more than the library kept
- small bugs that exploded (2026-11-02, 15 parts) - a number that crossed a file without its unit
- functional programming (2026-10-27, 12 parts) - absence and failure as values
- timestamps (2026-10-21, 13 parts) - how Jan 31 plus one month becomes four different days
- float to integer (2026-10-20) - four ways to lose a cent
Every earlier entry is in entries/, one file per day.