Classes (member functions returning obj of same class?)

Short answer yes... long answer: yes, but it can get real dicey. Take a look:

Type
  TMyObject=class
  Name:string;
  Procedure Foo(str1,str2:TMyObject);
  Function Bar:TMyObject;

end;
type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}



procedure TForm1.Button1Click(Sender: TObject);
var MyObj,Myobj2:TMyObject;
begin
   MyObj:=TMyObject.Create;
   MyObj.Name:='DrDelphi';
   Myobj2:=MyObj.Bar;
   MyOBj2.Name:='To the rescue!!';
   MyObj.Foo(myobj,myobj2);
end;

{ TMyObject }

function TMyObject.Bar: TMyObject;
begin
  Result:=TMyObject.Create;
end;

procedure TMyObject.Foo(str1, str2: TMyObject);
begin
   Showmessage(str1.Name);
   Showmessage(str2.Name);

end;

yes, why not?

a sample

unit tsring_u;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

 TString=class(TObject)
 private
   fstring : string; //or whatever you need for store
 public
   function Copy(Amount:integer):TString;
   Procedure Append(sStr:TString);
 published
   Property AString : String read fString write FString;
 end;


var
  Form1: TForm1;

implementation

{$R *.DFM}

//implementation of the TString Object
Function TString.Copy(Amount : integer) : TString;
begin
  //whatever you want to do there
  result := TString.Create;
  result.AString := system.Copy(fString,1,Amount);
end;

Procedure TString.Append(sStr:TString);
begin
  //whatever you want to do there
  If assigned(sStr) then
    fString := fString+sStr.AString;
end;
//end implementation of the TString Object


//usage sample
procedure TForm1.Button1Click(Sender: TObject);
var
  s1,s2 : Tstring;
begin
  s1 := tstring.Create;
  s1.AString := Edit1.Text;
  s2 := s1.Copy(3);
  s2.Append(s1);
  Edit2.Text := s2.AString;
  s1.free;
  s2.free;
end;

end.

ok that sounds good, i thought it may be *bad* programming practice or something!


will

You seem to know what your talking about, thanks for the help.

PS.Know anything about programming peer to peer networks such as kazaa? check out my latest question.