function bracket bracket<R>(acquire: () => R | Promise<R>,release: (r: R) => void | Promise<void>,): unknown Resource management pattern (like Haskell's bracket or try-with-resources). Ensures cleanup happens even if the operation throws. Examples Example 1 const withConnection = bracket( () => openConnection(), (conn) => conn.close() ); const result = await withConnection(async (conn) => conn.query('SELECT 1')); Type Parameters R Parameters acquire: () => R | Promise<R> release: (r: R) => void | Promise<void> Return Type unknown