[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Objects' (#rtl)

TCollection.AtInsert

Insert an element at a certain position in the collection.

Declaration

Source position: objects.pp line 430

procedure TCollection.AtInsert(

  Index: Sw_Integer;

  Item: Pointer

);

Description

AtInsert inserts Item in the collection at position Index, shifting all elements by one position. In case the current limit is reached, the collection will try to expand with a call to SetLimit

Errors

If Index isn't valid then Error is called with CoIndexError. If the collection fails to expand, then coOverFlow is passed to Error.

See also

TCollection.Insert

  

Insert a new item in the collection at the end.

Example

Program ex34;

{ Program to demonstrate the TCollection.AtInsert method }

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

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

Procedure PrintField (Dummy: Pointer;P : PMyObject);

begin
  Writeln ('Field : ',P^.GetField);
end;


begin
  Randomize;
  C:=New(PCollection,Init(120,10));
  Writeln ('Inserting 100 records at random places.');
  For I:=1 to 100 do
    begin
    M:=New(PMyObject,Init);
    M^.SetField(I-1);
    If I=1 then
      C^.Insert(M)
    else
      With C^ do
        AtInsert(Random(Count),M);
    end;
  Writeln ('Values : ');
  C^.Foreach(@PrintField);
  Dispose(C,Done);
end.

Documentation generated on: Jun 22 2020