Typescript tryCatch helper function using Rust like Result<T, E> types.

tryCatch.ts

function tryCatch<T>(fn: () => T, andFinally?: () => void): Result<T, string> {
  try {
    return Ok(fn());
  } catch (err) {
    return Err(`Fn threw an error ${err}`);
  } finally {
    andFinally?.();
  }
}

const user = {
  email: "asd@dsaf.df",
  name: "asdas",
};

const stringToTest = JSON.stringify(user);

const typedVal = tryCatch<typeof user>(
  () => JSON.parse(stringToTest),
  () => {
    console.log("parsing was performed");
  }
);

const parsedVal = typedVal.unwrapOr({ name: "", email: "" }); //unwrap with default value if err

if (typedVal.isErr()) {
  console.log("failed to parse json");
} else {
  console.log(typedVal.unwrap());
}