TCollection.Pack

Remove all >Nil pointers from the collection.

Declaration

Source position: objects.pp line 457

Description

Pack removes all Nil pointers from the collection, and adjusts Count to reflect this change. No memory is freed as a result of this call. In order to free any memory, you can call SetLimit with an argument of Count after a call to Pack.

Errors

None.

See also

Example

Program ex21;

{ Program to demonstrate the TCollection.FirstThat method }

Uses Objects,MyObject; { For TMyObject definition and registration }

Var C : PCollection;
    M : PMyObject;
    I : Longint;

Function CheckField (Dummy: Pointer;P : PMyObject) : Longint;

begin
  If P^.GetField>56 then
    Checkfield:=1
  else
    CheckField:=0;
end;

begin
  C:=New(PCollection,Init(100,10));
  For I:=1 to 100 do
    begin
    M:=New(PMyObject,Init);
    M^.SetField(I);
    C^.Insert(M);
    end;
  Writeln ('Inserted ',C^.Count,' objects');
  Writeln ('first one for which Field>56  has index (should be 56) : ',
            C^.IndexOf(C^.FirstThat(@CheckField)));
  C^.FreeAll;
  Dispose(C,Done);
end.