90年代晚期，用户档案成为一个社交服务站点的核心特征。允许用户编辑好友清单和搜索其他有类似兴趣的用户。
In the late 1990s, user profiles became a central feature of social networking sites, allowing users to compile lists of "friends" and search for other users with similar interests.
通过这个应用，你可以更新地理位置信息，对好友喊话，以及追踪个人达成的“成就”。与朋友分享你的待办事项清单。
From within the app, you can update your location, send shouts to your friends, track your 'achievements,' and keep a to-do list that is Shared with your friends.
清单4中的代码实现了一个简单的解析器，它假设我们使用冒号分隔好友ID和相关的通知，并使用分号分隔后续通知。
The code in listing 4 implements a crude parser that assumes that we use colons to separate buddy IDs from the associated note and semicolons to separate subsequent notes.
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