MoreEnumerable.Subsets<T> Method (IEnumerable<T>) |
Returns a sequence of IList<T> representing all of
the subsets of any size that are part of the original sequence. In
mathematics, it is equivalent to the power set of a set.
Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 3.0.0
SyntaxParameters
- sequence
- Type: System.Collections.Generic.IEnumerable<T>
Sequence for which to produce subsets
Type Parameters
- T
- The type of the elements in the sequence
Return Value
Type: IEnumerable<IList<T>>A sequence of lists that represent the all subsets of the original sequence
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerable<T>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).Exceptions| Exception | Condition |
|---|---|
| ArgumentNullException | Thrown if sequence is null |
Remarks
This operator produces all of the subsets of a given sequence. Subsets are returned
in increasing cardinality, starting with the empty set and terminating with the
entire original sequence.
Subsets are produced in a deferred, streaming manner; however, each subset is returned as a materialized list.
There are 2^N subsets of a given sequence, where N => sequence.Count().
Subsets are produced in a deferred, streaming manner; however, each subset is returned as a materialized list.
There are 2^N subsets of a given sequence, where N => sequence.Count().
See Also