A small dictionary in typescript

dict.ts

export type Dictionary<T> = {
	[x: string]: T;
};

export function convertListToDictionary<T extends { id: string }>(
	items: T[]
): Dictionary<T> {
	const dict: Dictionary<T> = {};
	items.forEach(item => {
		dict[item.id] = item;
	});

	return dict;
}

export function convertDictionaryToList<T extends { id: string }>(
	dict: Dictionary<T>
): T[] {
	return Object.keys(dict).map(key => dict[key]);
}