Stdle #97 · generics · 2026-09-11
What does this TypeScript snippet output?
A past puzzle — fully playable. 4 attempts, hints on wrong guesses.
function first<T extends unknown[]>(a: T) { return a[0] }console.log(first<number[]>([10, 20]))Generics
Stdle #97 · generics · 2026-09-11
A past puzzle — fully playable. 4 attempts, hints on wrong guesses.
function first<T extends unknown[]>(a: T) { return a[0] }console.log(first<number[]>([10, 20]))