TCollection.ForEach
Execute procedure for each item in the list.
Declaration
Source position: objects.pp line 452
default
procedure ForEach(Action: TCallbackProcParam);
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
| Name | Description |
|---|---|
| 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.