Class T2DSparseBooleanArray

Unit

SparseDataSets

Declaration

type T2DSparseBooleanArray = class(T2DSparsePointerArray)

Description

T2DSparsePointerArray acts like a 2D array of pointers. It provides constant time access to its elements through the its Items property. However, when many of the elements are nil, it can use much less memory than an array.

Hierarchy

• TObject
• T2DSparsePointerArray
• T2DSparseBooleanArray

Overview

Fields

	FFalse: boolean;
	FTrue: boolean;

Methods

	function GetItems(const Row, Col: NativeInt): boolean;
	procedure SetItems(const Row, Col: NativeInt; const Value: boolean);
	constructor Create(Quantum: TSPAQuantum);

Properties

property Items[constRow,Col:NativeInt]: boolean read GetItems write SetItems;

Description

Fields

	FFalse: boolean;
The address of FFalse is stored to indicate a value that is False.

	FTrue: boolean;
The address of FTrue is stored to indicate a value that is True.

Methods

	function GetItems(const Row, Col: NativeInt): boolean;
See Items.

	procedure SetItems(const Row, Col: NativeInt; const Value: boolean);
See Items.

	constructor Create(Quantum: TSPAQuantum);
Create creates an instance of T2DSparseBooleanArray.

Properties

	property Items[constRow,Col:NativeInt]: boolean read GetItems write SetItems;
Items provides access to the boolean stored at location Layer, Row, Col. Before reading Items, read IsValue to be sure that a boolean is stored at Layer, Row, Col.