#node 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 Promisify a Callback Function
Convert a Node-style `(err, result)` callback API into a Promise-returning function. Type-safe via generics — the inferred Promise resolves to the original callback's result type.
TypeScript Environment Variable Validator
Validate process.env at boot-time and exit fast if anything's missing. The returned object is typed so the rest of the code reads `env.DATABASE_URL` instead of `process.env.DATABASE_URL!`.