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I wanted to know how yahoo fetches list of logged (facebook) in users only those friends who also has read article on yahoo in order by recency...

link for referance: http://in.news.yahoo.com/ (you must log in with fb and then you will see your friends list in header if any one of your friends has already sign in on yahoo and read any article)

thanks in advance

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一旦您使用 facebook 登录 yahoo，yahoo 就会存储您的用户 ID 并存储您所有朋友的用户 ID。

当您的朋友“X”阅读一篇文章时，它会设置一个“X”已阅读该文章的标志。

现在，当您登录时，它会检查数据库并获取您朋友用户 ID 的列表，然后检查他们中的任何人是否也阅读过该文章。

如果是，它会在您旁边显示它们。

于 2012-04-06T20:21:34.100 回答