option-t/esm/undefinable/operators/and.js

A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.

import { isNotUndefined } from '../core/undefinable.js';
/**
 *  Return _b_ if _a_ is not `undefined`.
 *  Otherwise, return _a_.
 */
export function andForUndefinable(a, b) {
    if (isNotUndefined(a)) {
        return b;
    }
    return undefined;
}