哪些列表可以用作临时列表? [英] Which lists could serve as temporary lists?

问题描述

在使用仅用作临时容器的项目列表时，您会建议我使用哪种列表类型?

When working with lists of items where the lists just serve as a temporary container - which list types would you recommend me to use?

我

• 不想手动销毁列表
• 想要使用内置列表类型(无框架，库等)
• 想要泛型

• don't want to destroy the list manually
• would like to use a built-in list type (no frameworks, libraries, ...)
• want generics

在不引起泄漏的情况下使之成为可能的事情:

Something which would make this possible without causing leaks:

function GetListWithItems: ISomeList;
begin
  Result := TSomeList.Create;
  // add items to list
end;

var
  Item: TSomeType;
begin
  for Item in GetListWithItems do
  begin
    // do something
  end;
end;

我有什么选择?这是关于Delphi 2009的信息，但是出于知识的考虑，还请提及2010+年在这方面是否有新的东西.

What options do I have? This is about Delphi 2009 but for the sake of knowledge please also mention if there is something new in this regard in 2010+.

推荐答案

标准列表类(例如TList，TObjectList，TInterfaceList等)没有实现自动生命周期，因此您必须手动释放它们当您完成使用它们时.如果要通过接口访问列表类，则必须自己实现，例如:

The standard list classes, like TList, TObjectList, TInterfaceList, etc, do not implement automated lifecycles, so you have to free them manually when you are done using them. If you want a list class that is accessible via an interface, you have to implement that yourself, eg:

type
  IListIntf = interface
    ...
  end;

  TListImpl = class(TInterfacedObject, IListIntf)
  private
    FList: TList;
    ...
  public
    constructor Create; override;
    destructor Destroy; override;
    ...
  end;

constructor TListImpl.Create;
begin
  inherited;
  FList := TList.Create;
end;

destructor TListImpl.Destroy;
begin
  FList.Free;
  inherited;
end;

function GetListWithItems: IListIntf;
begin
  Result := TListImpl.Create;
  // add items to list
end;   

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