auto<K, V> static method

Map<K, V> auto<K, V>(Map<K, V> creator())

Returns a map that will be created only when necessary, such as

• Map.putIfAbsent is called.
• It assumes the map was empty, and creates by invoking creator
• when necessary. Don't use this method if the map already exists.
• It is useful to save the memory, if you have a map that won't contain
• anything in most case.
• Notice you don't have to keep the object being returned by this method,
• since it is just a proxy to the real map.
• Refer to Rikulo UI's View.dataset for a sample implementation.

Implementation

static Map<K, V> auto<K, V>(Map<K, V> creator()) => _OnDemandMap(creator);