generics.collectionsex.pas

Delphi 2009 Generics class. this is an enhanced generics class to use. Tested.

unit Generics.CollectionsEx;

interface

uses
  Generics.Collections;

type
  TPredicate<T> = reference to function(const Value: T): Boolean;

  TListEx = class
  public
    class procedure FindAll<T>(Source: TEnumerator<T>; Dest: TList<T>;
      const Predicate: TPredicate<T>); overload; static;
    class procedure FindAll<T>(Source: TEnumerable<T>; Dest: TList<T>;
      const Predicate: TPredicate<T>); overload; static;
  end;

implementation

class procedure TListEx.FindAll<T>(Source: TEnumerator<T>; Dest: TList<T>;
  const Predicate: TPredicate<T>);
begin
  while Source.MoveNext do
  begin
    if Predicate(Source.Current) then
      Dest.Add(Source.Current);
  end;
end;

class procedure TListEx.FindAll<T>(Source: TEnumerable<T>; Dest: TList<T>;
  const Predicate: TPredicate<T>);
begin
  FindAll<T>(Source.GetEnumerator, Dest, Predicate);
end;

end.