#programming

Technical debt is not one thing. It has at least three distinct flavors: Deliberate: we know this is messy, we chose speed over cleanliness, we'll fi…

Three data structures explain 80% of algorithm interview problems: Hash map: O(1) lookup. First reach for it whenever you need to count, group, or lo…

Debugging is search through a state space. The space is huge, and most of it is irrelevant. Good debuggers are good at pruning: Bisect: cut the space…

Go's error handling is verbose but explicit. The cost is real; the benefit is also real: every error is handled where it's returned. You cannot accide…

SQLite runs in 3 billion devices. It is the most deployed database in the world. For most apps, it is the right database. Not because it's simple — i…

An abstraction is useful when it hides the right things. Good abstractions: TCP/IP hides physical medium; you think in packets SQL hides storage layo…

Go got this right: small interfaces, no inheritance. A type satisfies an interface by having the methods. No "implements" keyword. No taxonomy to mai…

Three patterns I use constantly in Go: Fan-out / Fan-in Distribute work across goroutines, collect results via a single channel. Pipeline Each stage…