Class T2DSparseRealArray

Unit

SparseDataSets

Declaration

type T2DSparseRealArray = class(T2DSparsePointerArray)

Description

T2DSparseRealArray acts like a 2D array of real numbers. It provides constant time access to its elements through the its Items property. However, when many of the elements are unassigned, it can use much less memory than an array.

Hierarchy

• TObject
• T2DSparsePointerArray
• T2DSparseRealArray

Overview

Fields

	FCount: NativeInt;
	FValues: array of double;

Methods

	function GetItems(const Index1, Index2: NativeInt): double;
	procedure SetItems(const Index1, Index2: NativeInt; const Value: double);
	procedure Clear; override;
	constructor Create(Quantum: TSPAQuantum);

Properties

property Items[constIndex1,Index2:NativeInt]: double read GetItems write SetItems;

Description

Fields

	FCount: NativeInt;
FCount is the number of real numbers stored in T2DSparseRealArray.

	FValues: array of double;
FValues is an array of real-numbers stored in T2DSparseRealArray

Methods

	function GetItems(const Index1, Index2: NativeInt): double;
See Items.

	procedure SetItems(const Index1, Index2: NativeInt; const Value: double);
See Items.

	procedure Clear; override;
Clear removes all the members of T2DSparseRealArray.

	constructor Create(Quantum: TSPAQuantum);
Create creates an instance of T2DSparseRealArray.

Properties

	property Items[constIndex1,Index2:NativeInt]: double read GetItems write SetItems;
Items provides access to the real number stored at location Index1, Index2. Before reading Items, read IsValue to be sure that a number is stored at Index1, Index2.