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

TCollection.ForEach

Execute procedure for each item in the list.

Declaration

Source position: objects.pp line 417

procedure TCollection.ForEach(

  Action: Pointer

);

Description

ForEach calls Action for each element in the collection, and passes the element as an argument to Action.

Action is a procedural type variable that accepts a pointer as an argument.

Errors

None.

See also

TCollection.FirstThat

  

Return first item which matches a test.

TCollection.LastThat

  

Return last item which matches a test.

Example

Program ex21;

{ Program to demonstrate the TCollection.Foreach 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
  C:=New(PCollection,Init(100,10));
  For I:=1 to 100 do
    begin
    M:=New(PMyObject,Init);
    M^.SetField(100-I);
    C^.Insert(M);
    end;
  Writeln ('Inserted ',C^.Count,' objects');
  C^.ForEach(@PrintField);
  C^.FreeAll;
  Dispose(C,Done);
end.