deep-random-pick/src/randompick.ts

Picks a pseudo-random item from a pool in several ways, including a recursive method that allows for more control over probability.

import { shallowPick } from './shallowpick';

export const randomPick = (...items) => {
    const itemPicked = shallowPick(items);
    if (Array.isArray(itemPicked) && itemPicked.length > 0) {
        // Recursion is required here.
        return randomPick(itemPicked);
    } else {
        return itemPicked;
    }
}