Compositions<T> class

A pseudo-list of Compositions (combinations with repetition).

A pseudo-list "containing" all the r-Compositions of objects taken from the list items.

Example

final s = Compositions(3, characters("abcd"));
print("There are ${s.length} 3-Compositions of the objects");
print("in ${s.items}.");
print("The first selection is ${c[0]}.");

Inheritance

• Object
• Combinatorics<T>
• Compositions

Constructors

Compositions(int r, List<T> items)

Properties

hashCode → int

The hash code for this object.

no setter, inherited

items → List<T>

The list from which the objects are selected

no setter, override

iterable → Iterable

An Iterable object that "contains" all the arrangements.

no setter, inherited

length → BigInt

The number of arrangements "contained" in this pseudo-list.

no setter, override

r → int

The number of items taken from items.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call([Object? fromTo, Object? to]) → Iterable<List<T>>

inherited

contains(List<T> x) → bool

Returns whether x is in the pseudo-list.

override

indexOf(List<T> selection, [BigInt? start]) → BigInt

Returns the index of selection in the list of arranged Compositions.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

range(Object fromTo, [Object? to]) → Iterable<List<T>>

Returns a range of arrangements.

inherited

sample(int n, {int? seed, bool withReplacement = false}) → Iterable

Generates a random sample of arrangements from this pseudo-list.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

operator [](Object k) → List<T>

The kth arrangement.

override