namespace formgen.helpers.map
{

	/**
	 */
	export function read<type_value>(
		map : Record<string, type_value>,
		key : string,
		fallback : type_value
	) : type_value
	{
		return ((key in map) ? map[key] : fallback);
	}


	/**
	 */
	export function transform<type_value_from, type_value_to>(
		map : Record<string, type_value_from>,
		function_ : ((string, type_value_from) => type_value_to)
	) : Record<string, type_value_to>
	{
		return Object.fromEntries(
			Object.entries(map)
			.map(([key, value]) => ([key, function_(key, value)]))
		);
	}


	/**
	 */
	export function to_pairs<type_value>(
		map : Record<string, type_value>,
	) : Array<{key : string; value : type_value;}>
	{
		return (
			Object.entries(map)
			.map(([key, value]) => ({"key": key, "value": value}))
		);
	}
	
}