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TCollection.ForEach procedure

Member of TCollectionIn unit Objects

Execute procedure for each item in the list.

Declaration

pascal
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

Example: ex21

pascal
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.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.