Brief introduction of Container class in Delphi2009

Introduction to Container class in Delphi2009:

1.TList class:

A container class that can store pointers provides a set of methods and properties to add, delete, rearrange, locate, access, and sort the classes in the container, which is a container based on an array mechanism that compares similar to vectors in C + + and Java in arraylist,tlist Often used to save a list of objects, an array-based mechanism makes it very fast to use subscripts to access objects in the container, but as the objects in the container increase, the speed of insertions and deletions is plummeting, so it is not appropriate to add and remove objects frequently.

Property	Describe
Count:integer;	Returns the number of items in a list
Items[index:integer]: pointer; Default	Direct access to items in a list by subscript 0 Index

Method	Type	Describe
ADD (item:pointer): Integer;	Function	Use to add pointers to the list
Clear;	Process	Empty items in a list
Delete (Index:integer);	Process	Delete items in a list that correspond to an index
IndexOf (item:pointer): Integer;	Function	Returns the index of the pointer in the list
Insert (Index:integer; Item:pointer);	Process	Inserts an item into the list at the specified location
Remove (item:pointer): Integer;	Function	Remove a pointer from the list

Name	Type	Describe
Capacity:integer;	Property	Can be used to get or set the number of pointers that a list can hold
Extract (Item:pointer): pointer;	function	Extract is similar to remove to delete a pointer from a list, but to return a pointer that is deleted.
Exchange (Index1, Index2:integer);	Procedure	Two pointers in the swap list
First:pointer;	function	Returns the first pointer in a linked list
Last:pointer;	function	Returns the last pointer in a linked list
Move (Curindex Newindex:integer);	Procedure	Move the pointer from the current position to the new location
Pack;	Procedure	Remove all nil pointers from the list
Sort (Compare:tlistsortcompare);	Procedure	Used to sort items in a linked list, you can set compare parameters for user-defined sort functions