#UnDefiNed

Sem86 is an x86 full-system emulator that loads instruction behavior from a file at runtime, so undefined or undocumented instructions can be changed by editing the file.…

A setting such as a booking link works on the server but shows up as undefined in the browser, with...

Every calorie app I tried wanted my email and a card before it showed me anything. So I built one...

Let’s start with a question! Is this program well-defined? 1 2 3 4 int main() { while (true) ; } If you said yes, you’d be wrong — at least before C++26. A while (true); loop with no side effects used to be undefined behaviour.…

Flip one tsconfig flag and watch the most common TS runtime bug class disappear. What it catches, what it breaks, and the cleanup pattern.

How to translate Java's Optional into TypeScript: union with undefined, Result discriminated unions, and fp-ts/Effect Option.

JVM devs port `Optional ` patterns to TS and shrink-wrap their codebase in unnecessary boxes. The unions, narrowing, and operators were already enough.

Kotlin has one bottom value. TypeScript has two, plus a missing-key state, and the gap is where ex-Kotlin devs ship bugs.

I pitted Tractive and Fi Mini smart cat collars against each other to find which was the best for activity, sleep, and GPS tracking.

From Reddit - r/typescript: Why does process.env still return `string | undefined` in TypeScript?

Going back to work after having a baby can be overwhelming. You're juggling all the emotions of being a new parent while getting up to speed at your job. Tips to help you make a smooth transition.

Trump threatened to bomb Iran's power plants and bridges unless it opens the Strait of Hormuz. And, NASA's Artemis II crew prepares to make its closest approach to the moon.