Class CompressedCollection<T>

Sparse collection storing only explicitly set values while appearing to contain values at all indexes, using a default value for unset positions. Enables efficient memory usage for large, mostly-empty grids such as worksheet cell data.

Inheritance
System.Object
CompressedCollection<T>
CompressedExpressionCollection
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: Telerik.Windows.Documents.Spreadsheet.Expressions.DataStructures
Assembly: Telerik.Windows.Documents.Spreadsheet.dll

Syntax

public class CompressedCollection<T> : IEnumerable<T>, IEnumerable
Type Parameters
T

The value type stored by the collection.

Constructors

CompressedCollection(Int32, Int32, T)

Initializes a new instance of the CompressedCollection class with specified dimensions and default value for unset cells.

Declaration
public CompressedCollection(int rowCount, int columnCount, T defaultValue)
Parameters
System.Int32 rowCount

The number of rows.
System.Int32 columnCount

The number of columns.
T defaultValue

The default value used to initialize all cells of the collection.

Properties

HasValues

Indicates whether any values have been explicitly set in the collection.

Declaration
public bool HasValues { get; }
Property Value
System.Boolean

Item[Int32, Int32]

Accesses the value at the specified row and column, returning the default value if the cell has not been explicitly set.

Declaration
public T this[int rowIndex, int columnIndex] { get; set; }
Parameters
System.Int32 rowIndex

The row index of the cell.
System.Int32 columnIndex

The column index of the cell.
Property Value
T

Length

The total logical capacity of the collection, representing all positions including unset ones.

Declaration
public int Length { get; }
Property Value
System.Int32

Methods

GetEnumerator()

Returns an enumerator that iterates through all logical positions in row-major order, yielding default values for unset cells.

Declaration
public IEnumerator<T> GetEnumerator()
Returns
System.Collections.Generic.IEnumerator<T>

The enumerator.
Implements
System.Collections.Generic.IEnumerable<T>.GetEnumerator()

GetLength(Int32)

Returns the size of the specified dimension: 0 for row count, 1 for column count.

Declaration
public int GetLength(int dimension)
Parameters
System.Int32 dimension

The dimension for which to get the length. 0 for rows, 1 for columns.
Returns
System.Int32

The number of items in the selected dimension.

Explicit Interface Implementations

IEnumerable.GetEnumerator()

Declaration
IEnumerator IEnumerable.GetEnumerator()
Returns
System.Collections.IEnumerator

Implements
System.Collections.IEnumerable.GetEnumerator()

Extension Methods