Another way is to declare TMyRec as class instead of record.
In this case, you don't need the dereference operator ^ .
No need of new and dispose, just Create and Free, as for TMyRecList.
I don't know if there is a better performance when you use a record,
but as far as I know, record/object/new/dispose is just the old syntax
for the first object oriented programming born with Turbo Pascal 5.5
around 1989.
The new syntax with class / constructor Create / destructor Free is born
Delphi 1 around 1995.
Below is your code modified with TMyRec=class
==========================
program Project1;
{$mode objfpc}{$H+}
uses
SysUtils, Classes;
type
TMyRec=class
Value: Integer;
AByte: Byte;
end;
TMyRecList=class(TList)
private
function Get(Index: Integer): TMyRec;
public
destructor Destroy; override;
function Add(Value: TMyRec): Integer;
property Items[Index: Integer]: TMyRec read Get; default;
end;
{ TMyRecList }
function TMyRecList.Add(Value: TMyRec): Integer;
begin
Result := inherited Add(Value);
end;
destructor TMyRecList.Destroy;
var
i: Integer;
begin
for i := 0 to Count - 1 do
Items[i].Free;
inherited;
end;
function TMyRecList.Get(Index: Integer): TMyRec;
begin
Result := TMyRec(inherited Get(Index));
end;
var
MyRecList: TMyRecList;
MyRec: TMyRec;
tmp: Integer;
begin
MyRecList := TMyRecList.Create;
for tmp := 0 to 9 do
begin
MyRec:= TMyRec.Create;
MyRec.Value := tmp;
MyRec.AByte := Byte(tmp);
MyRecList.Add(MyRec);
end;
for tmp := 0 to MyRecList.Count - 1 do
Writeln('Value: ', MyRecList[tmp].Value, ' AByte: ',
MyRecList[tmp].AByte);
WriteLn(' Press Enter to free the list');
ReadLn;
MyRecList.Free;
end.
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