#narrowing Clear
Tags #php #kotlin #bash #go #sql #rust #typescript #html #java #python #files #utils #strings #http #concurrency #async #json #arrays #security #types #crypto #database #dates #format
TypeScript User-Defined Type Guards
When TypeScript can't narrow a union for you, write a `x is T` predicate. Inside any block where the guard returns true, the compiler knows the narrower type.