tuple 0.1.2 tuple: ^0.1.2 copied to clipboard
Tuple data structure
Tuple data structure #
There are two versions of this data structure:
- mutable [Tuple2], [Tuple3]...
- persistent [PersistentTuple2], [PersistentTuple3]...
Usage example #
final t = new Tuple2<String, int>('a', 10); print(t.i1); // prints 'a' print(t.i2); // prints '10'
Persistent Tuple #
In computing, a persistent data structure is a data structure that always preserves the previous version of itself when it is modified. Such data structures are effectively immutable, as their operations do not (visibly) update the structure in-place, but instead always yield a new updated structure. (A persistent data structure is not a data structure committed to persistent storage, such as a disk; this is a different and unrelated sense of the word "persistent.")
final t1 = const PersistentTuple2<String, int>('a', 10); final t2 = t1.setI1('c'); // t2 is a new [PersistentTuple2] object with i1 is 'c' and i2 is 10.