meshtastic/src/utils/showcase.ts

export const sortBy = <T>(array: T[], getter: (item: T) => unknown): T[] => {
	const sortedArray = [...array];
	sortedArray.sort((a, b) =>
		getter(a) > getter(b) ? 1 : getter(b) > getter(a) ? -1 : 0,
	);
	return sortedArray;
};

export const difference = <T>(...arrays: T[][]): T[] => {
	return arrays.reduce((a, b) => a.filter((c) => !b.includes(c)));
};

export const toggleListItem = <T>(list: T[], item: T): T[] => {
	const itemIndex = list.indexOf(item);
	if (itemIndex === -1) {
		return list.concat(item);
	} else {
		const newList = [...list];
		newList.splice(itemIndex, 1);
		return newList;
	}
};