CollectionSampler class
Samples collections
selecting N items from collections is done via Resevoir Sampling, see reservoirSampling for more details.
Constructors
- CollectionSampler([Random? r])
- Construct new collection sampler w/ injectible random
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
pick<
T> (List< T> items) → T - pick an item at random from the list -- restricted to List because size is known, and elementAt is implemented efficiently.
-
pickFromMap<
K, V> (Map< K, V> itemMap) → V - pick an value at random from the map
-
pickN<
T> (Iterable< T> items, int N, {bool unique = true}) → List<T> - Picks N items from iterable, optionally make it unique.
-
pickUniqueNFromMap<
K, V> (Map< K, V> itemMap, int n) → Iterable<V> - picks N items from Map (returning map values)
-
pickUniqueNFromMapAsMap<
K, V> (Map< K, V> itemMap, int n) → Map<K, V> - pick N unique values from the map. will return at most itemMap.length items
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited