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>`.
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TypeScript
import type { TransformFn } 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 mapOrForOption<T, U>(input: Option<T>, defaultValue: U, transformer: TransformFn<T, U>): U;