Returns ((initial) => List<T>)

The built list.

Examples

import { unfoldR, toArray } from "./list.ts";
import * as Option from "./option.ts";
import { assertEquals } from "../deps.ts";

const decrement = (n: number): Option.Option<[number, number]> => {
    if (n == 0) {
        return Option.none();
    }
    return Option.some([n, n - 1]);
};

assertEquals(toArray(unfoldR(decrement)(10)), [
    10,
    9,
    8,
    7,
    6,
    5,
    4,
    3,
    2,
    1,
]);
Copy

• • (initial): List<T>

  • Parameters

    • initial: U

    Returns List<T>