Subset<T>

public sealed class Subset<T> : IEnumerable<T>

Create a subset indexer for arrays.

Type parameters:

Constructors

Subset

public Subset(T[] array, int[] indices)

Create a new subset.

Parameters:

array (T[])	Base array.
indices (int[])	Indices in subset. This array will be sorted, so do not expect it to be in the same state after calling this constructor.

Properties

Array

public T[] Array { get; }

Gets the underlying array.

Indices

public IReadOnlyList<int> Indices { get; }

Gets the subset indices.

Length

public int Length { get; }

Gets the length of the subset.

SubsetItems

public IEnumerable<T> SubsetItems { get; }

Enumerate over all items in the array subset.

Indexers

this[]

public T this[int index] { get; }

Gets the array item at the given subset index.

Parameters:

index (int)

Subset index.

Returns: Array item at Subset[index].

Methods

ArrayIndex

public int ArrayIndex(int subsetIndex)

Gets the array index associated with the given subset index.

Parameters:

subsetIndex (int)

GetEnumerator

public IEnumerator<T> GetEnumerator()

Returns an enumerator that iterates through the collection.

Returns: An enumerator that can be used to iterate through the collection.

IsPartOfSubset

public bool IsPartOfSubset(int arrayIndex)

Test whether the array index is covered by the subset map.

Parameters:

arrayIndex (int)

Array index to test.

Returns: True if index is included in the subset.

SubsetIndex

public int SubsetIndex(int arrayIndex)

Gets the subset index associated with the given array index.

Parameters:

arrayIndex (int)

Explicit

IEnumerable.GetEnumerator

IEnumerator IEnumerable.GetEnumerator()