Function mergeMaybeArrays

lib/asset/AssetGenerator.js:73–81

(a, b)

 * @returns {T[] & U[]} array
 */
const mergeMaybeArrays = (a, b) => {
	/** @type {Set<T | U | null | undefined | string | Set<T> | Set<U>>} */
	const set = new Set();
	if (Array.isArray(a)) for (const item of a) set.add(item);
	else set.add(a);
	if (Array.isArray(b)) for (const item of b) set.add(item);
	else set.add(b);
	return /** @type {T[] & U[]} */ ([.../** @type {Set<T | U>} */ (set)]);
};

/**
 * Merges the provided values into a single result.