option-t
Version:
A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.
10 lines (9 loc) • 473 B
TypeScript
import type { AsyncTransformFn } from '../../internal/function.js';
import { type Option } from './option.js';
/**
* Return the result of _transformer_ with using _input_ as an argument for it if _input_ is `Some(T)`.
* Otherwise, return _defaultValue_.
*
* Basically, this operation is a combination `map()` and `unwrapOr()`.
*/
export declare function mapOrAsyncForOption<T, U>(input: Option<T>, defaultValue: U, transformer: AsyncTransformFn<T, U>): Promise<U>;