option-t/esm/undefinable/operators/zip.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';
/**
 *  Zips _self_ with another `Undefinable<T>`.
 *  If _self_ is `T` and _other_ is `U`, this method returns `[NotUndefined<T>, NotUndefined<U>]`.
 *  Otherwise, `undefined` is returned.
 */
export function zipForUndefinable(self, other) {
    if (isNotUndefined(self) && isNotUndefined(other)) {
        return [self, other];
    }
    return undefined;
}