operator [] method
The value for the given key
, or null
if key
is not in the map.
Some maps allow null
as a value.
For those maps, a lookup using this operator cannot distinguish between a
key not being in the map, and the key being there with a null
value.
Methods like containsKey or putIfAbsent can be used if the distinction
is important.
Implementation
@override
T? operator [](Object? key) {
if (key is! Snowflake) {
return null;
}
final entry = _store[(identifier: identifier, key: key)];
if (entry == null) {
return null;
}
entry.accessCount++;
return entry.value as T;
}