expect

function Result.expect(result: Result<T, E>, message: string): T

Unwraps the Ok value from the result. If the result is an Err, throws a ResultError with the given message.

Example

data-first

Result.expect(ok(5), "Expected a value");
// 5

Result.expect(err("fail"), "Expected a value");
// throws ResultError("Expected a value")

data-last

pipe(ok(5), Result.expect("Expected a value"));
// 5