标签：#hack

I kept reaching for Hashids/Sqids to keep sequential IDs out of URLs, but they don't use a real key — the alphabet is shuffled by a salt, and the Sqids FAQ says outright "there is no encryption of any kind." arxid is a keyed reversible permutation instead: a balanced Feistel network with an ARX (add-rotate-xor) round function over a 40-bit domain, mapping to a 7-char base62 code. Feed it an integer, get an unpredictable code back; same key reverses it. Runs ~16x faster than a structurally identi

- Everyday I read 2 pages of HN in the morning and 2 in the evening for years now - Of late, I noticed that most of the stuff on the 1st 2 pages is AI this, AI that, LLM this, LLM that, model here, model there - Today I am going to attempt to break that trend by sharing the greatest resources on HN from my collection of 50000+ bookmarks over the last decade - I have a process on my end for bookmarking - The most visual explainers get S-Tier ranking - Good info from reputed sources gets an A, non