posts — dídac

two databases, one binary: duckdb for reads, sqlite for state
rust · 12 min

↵ open 02 2026-06-01

brute-forcing the pit window: when 'just try them all' is the right call
rust · 10 min

↵ open 03 2026-05-25

a query language in ~1000 lines: lexer, parser, evaluator
rust · 12 min · logmole series

↵ open 04 2026-05-18

don't let your backtest lie to you: leakage guards for a solo research codebase
python · 12 min

↵ open 05 2026-05-11

clean and verified are different claims: a two-axis trust state machine in postgres
rust · 11 min

↵ open 06 2026-05-04

cookieless analytics: how a rotating daily salt kills the consent banner
rust · 13 min

↵ open 07 2026-04-27

hand-rolling ols regression in rust, and the collinearity trap that ate my coefficients
rust · 13 min

↵ open 08 2026-04-20

rust + wasm canvas2d charts with zero javascript libraries
rust · 12 min

↵ open 09 2026-04-13

welford's algorithm and why i never store the samples
rust · 11 min · logmole series

↵ open 10 2026-04-06

multi-tenant isolation is a security boundary, not a query filter
typescript · 11 min