Mon, 07 Jul 2008 19:09:00 GMT--好好学习，天天向上http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/90758602/1091900/1/item.htmlcomments/2622667.aspx0comments/commentRss/2622667.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2622667最近处理数据，经常需要读一行数据，处理，写入文件，采用fprintf函数效率很低，好的做法就是先把数据写入缓冲区，然后缓冲区满后再写入文件，这样减少IO操作。下面吧这个功能封装，构造函数需要写入输出文件路径已经缓冲区大小，然后writeToFile函数实现将字符串写入文件，最后用close来关键文件以及清空缓冲区 <img src ="aggbug/2622667.aspx" width = "1" height = "1" />Tue, 08 Jul 2008 03:09:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/07/07/2622667.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/07/07/2622667.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/07/07/2622667.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/90758602/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/89178288/1091900/1/item.htmlcomments/2602637.aspx0comments/commentRss/2602637.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2602637看C陷阱与缺陷的一点收获<img src ="aggbug/2602637.aspx" width = "1" height = "1" />Wed, 02 Jul 2008 00:33:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/07/01/2602637.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/07/01/2602637.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/07/01/2602637.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/89178288/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350439/1091900/1/item.htmlcomments/2584129.aspx0comments/commentRss/2584129.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2584129c陷阱与缺陷<img src ="aggbug/2584129.aspx" width = "1" height = "1" />Wed, 25 Jun 2008 15:54:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/06/25/2584129.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/06/25/2584129.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/06/25/2584129.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350439/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350440/1091900/1/item.htmlcomments/2577691.aspx0comments/commentRss/2577691.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2577691http://blog.csdn.net/java060515/archive/2007/04/19/1570243.aspx<br />如果说过去的十年是搜索技术大行其道的十年，那么个性化推荐技术将成为未来十年中最重要的革新之一。目前几乎所有大型的电子商务系统，如Amazon、CDNOW、Netflix等，都不同程度地使用了各种形式的推荐系统。而近来以“发现”为核心的网站正开始在互联网上崭露头角，比如侧重于音乐推荐的八宝盒，侧重于图书推荐的豆瓣等等。&nbsp;那么，一个好的推荐系统需要满足什么目标呢？个性化推荐系统必须能够基于用户之前的口味和喜好提供相关的精确的推荐，而且这种口味和喜欢的收集必须尽量少的需要用户的劳动。推荐的结果必须能够实时计算，这样才能够在用户离开网站前之前获得推荐的内容，并且及时的对推荐结果作出反馈。实时性也是推荐系统与通常的数据挖掘技术显著不同的一个特点。&nbsp;一个完整的推荐系统由三部分构成：行为记录模块、模型分析模块和推荐模块。行为记录模块负责记录能够体现用户喜好的行为，比如购买、下载、评分等。这部分看起来简单，其实需要非常仔细的设计。比如说购买和评分<img src 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+0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/06/03/2508963.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/06/03/2508963.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/06/03/2508963.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350441/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350442/1091900/1/item.htmlcomments/2508800.aspx0comments/commentRss/2508800.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2508800apriori :finding frequent itemsets using candidate generation<img src ="aggbug/2508800.aspx" width = "1" height = "1" />Wed, 04 Jun 2008 05:17:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/06/03/2508800.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/06/03/2508800.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/06/03/2508800.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350442/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350443/1091900/1/item.htmlcomments/2492007.aspx0comments/commentRss/2492007.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2492007测试一下<img src ="aggbug/2492007.aspx" width = "1" height = "1" />Thu, 29 May 2008 15:56:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/05/29/2492007.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/05/29/2492007.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/05/29/2492007.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350443/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350444/1091900/1/item.htmlcomments/2492008.aspx0comments/commentRss/2492008.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=2492008测试一下<img src ="aggbug/2492008.aspx" width = "1" height = "1" />Thu, 29 May 2008 15:56:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/05/29/2492008.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2008/05/29/2492008.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2008/05/29/2492008.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350444/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350445/1091900/1/item.htmlcomments/1553067.aspx1comments/commentRss/1553067.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1553067使用ruby写了一个根据ftp服务器列表自动遍历所有服务器查找对应的东东<img src ="aggbug/1553067.aspx" width = "1" height = "1" />Fri, 06 Apr 2007 00:08:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/04/05/1553067.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/04/05/1553067.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/04/05/1553067.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350445/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350446/1091900/1/item.htmlcomments/1544184.aspx0comments/commentRss/1544184.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1544184优点： 1 采用虚拟机实现跨平台 2 支持垃圾回收 3 脚本语言，灵活，容易扩展 4 支持面向对象 5 基于脚本语言，易于同Linux Shell进行交互 6 拥有功能强大和完善的标准类库 7 拥有良好的交互式运行环境:IRB，方便进行开发和调试 8 语言内置对规则表达式(Regular Express)的支持 9 直观的Block语法来实现循环遍历和函数回调 10 开放源代码 11 支持异常机制 12 同Perl和Python相比更容易用C语言扩展(来自Ruby官方网站) 13 支持动态载入类库 14 因为是解释型语言，不需要编译，修改后马上就可以执行 15 拥有一个完善的Web开发框架Rails。<img src ="aggbug/1544184.aspx" width = "1" height = "1" />Thu, 29 Mar 2007 00:25:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/28/1544184.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/03/28/1544184.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/28/1544184.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350446/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350447/1091900/1/item.htmlcomments/1538283.aspx0comments/commentRss/1538283.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1538283通过programming ruby 看china-pub dangdang dearbook~<img src ="aggbug/1538283.aspx" width = "1" height = "1" />Fri, 23 Mar 2007 17:41:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/23/1538283.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/03/23/1538283.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/23/1538283.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350447/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350448/1091900/1/item.htmlcomments/1532628.aspx0comments/commentRss/1532628.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1532628爽<img src ="aggbug/1532628.aspx" width = "1" height = "1" />Sun, 18 Mar 2007 18:58:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/18/1532628.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/03/18/1532628.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/18/1532628.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350448/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350449/1091900/1/item.htmlcomments/1532120.aspx0comments/commentRss/1532120.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1532120连通子图<img src ="aggbug/1532120.aspx" width = "1" height = "1" />Sat, 17 Mar 2007 22:41:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/17/1532120.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/03/17/1532120.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/17/1532120.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350449/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350450/1091900/1/item.htmlcomments/1530994.aspx0comments/commentRss/1530994.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1530994基本图算法应用<img src ="aggbug/1530994.aspx" width = "1" height = "1" />Fri, 16 Mar 2007 18:17:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/16/1530994.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/03/16/1530994.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/16/1530994.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350450/1091900http://item.feedsky.com/~csdn.net/hxxiaopei/~1091902/87350451/1091900/1/item.htmlcomments/1528680.aspx0comments/commentRss/1528680.aspxhttp://tb.blog.csdn.net/TrackBack.aspx?PostId=1528680装上rails了~<img src ="aggbug/1528680.aspx" width = "1" height = "1" />Wed, 14 Mar 2007 17:35:00 +0800xiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/14/1528680.aspx#Feedbackhttp://blog.csdn.net/hxxiaopei/archive/2007/03/14/1528680.aspxxiaopeihttp://blog.csdn.net/hxxiaopei/archive/2007/03/14/1528680.aspxhttp://blog.csdn.net/hxxiaopei/rss.aspxcsdn.net/hxxiaopei/~1091902/87350451/1091900