Class AnObjectQueue

Unit

classwork

Declaration

type AnObjectQueue = class(AnObjectList)

Description

This class alters the behavior of AnObjectList so that it can be used as a queue (first in, first out). It does this by modifying the behavior of AnObjectList.Pop so that it returns the first object in the list, instead of the last. Of course, like its parent, instances of AnObjectQueue can also be accessed as indexed arrays, if desired.

Hierarchy

• TObject
• AnObject
• APrintingObject
• ALinkedList
• AnObjectList
• AnObjectQueue

Overview

Methods

function Pop: TObject; override;

Description

Methods

	function Pop: TObject; override;
Remove the first object from the list and return it to the caller. This method overrides the behavior inherited from AnObjectList.Pop so that it returns the first object in the list, instead of the last. If there are no items in the list, this method returns Nil.