/// <summary> /// Atomically sets an item by first retrieving it, applying a map, and then putting it back. /// Calls the None delegate to return a new map if the item can't be found /// </summary> /// <remarks>Null is not allowed for a Key or a Value</remarks> /// <param name="key">Key</param> /// <param name="Some">delegate to map the existing value to a new one before setting</param> /// <param name="None">delegate to return a new map if the item can't be found</param> /// <exception cref="Exception">Throws Exception if Some returns null</exception> /// <exception cref="Exception">Throws Exception if None returns null</exception> /// <returns>New map with the item set</returns> public static Map <K, V> trySetItem <K, V>(Map <K, V> map, K key, Func <V, V> Some, Func <Map <K, V>, Map <K, V> > None) => map.TrySetItem(key, Some, None);
/// <summary> /// Atomically updates an existing item, unless it doesn't exist, in which case /// it is ignored /// </summary> /// <remarks>Null is not allowed for a Key or a Value</remarks> /// <param name="key">Key</param> /// <param name="value">Value</param> /// <exception cref="ArgumentNullException">Throws ArgumentNullException the value is null</exception> /// <returns>New Map with the item added</returns> public static Map <K, V> trySetItem <K, V>(Map <K, V> map, K key, V value) => map.TrySetItem(key, value);
