NEBA Forever

日志

· 【转载】 The PECS of Java Generic

· How does HBase update data on HDFS

· 【引用】interrupt, exception and trap

· PHP两类二进制包的区别

· Yahoo Query Language服务

· 【转载】动态规划算法的条件

· 【转载】js事件停止和return false的误用

· 测试一下Live Writer支持

· Linux换新网卡以后如何去掉旧的Interface

· 【视频】美式橄榄球入门介绍

【转载】 The PECS of Java Generic

2011-9-10 3:26:02 阅读46 评论0 102011/09 Sept10

from http://stackoverflow.com/questions/2723397/java-generics-what-is-pecs

Forward the best answer here:

Suppose you have a method that takes as its parameter a collection of things, but you want it to be more flexible than just accepting a Collection<Thing>.

作者 | 2011-9-10 3:26:02 | 阅读(46) |评论(0) | 阅读全文>>

How does HBase update data on HDFS

2011-6-12 12:30:42 阅读66 评论0 122011/06 June12

Usually HBase is built on HDFS as its storage substrates. However the current released version (0.20.x) of HDFS only supports the "write-only-once and read-many-times" model, namely it is lack of "append" operation; while HBase as a typical Non-SQL database must support "updates" on existing data set. At first glance, it seems that HDFS cannot meet the requirement. But it happens... The

作者 | 2011-6-12 12:30:42 | 阅读(66) |评论(0) | 阅读全文>>

【引用】interrupt, exception and trap

2011-1-17 6:17:37 阅读136 评论0 172011/01 Jan17

和大家分享这篇日志，我的看法是：

The 386 architecture recognizes two event classes: exceptions and

作者 | 2011-1-17 6:17:37 | 阅读(136) |评论(0) | 阅读全文>>

PHP两类二进制包的区别

2010-11-24 15:31:39 阅读102 评论0 242010/11 Nov24

一个很老的问题了。比如在PHP网站上能找到的Windows下的二进制包，一般常用的有以下两个链接：

PHP 5.2.14 zip package [10,281Kb] - 22 July 2010

PHP 5.2.14 Non-thread-safe zip package

作者 | 2010-11-24 15:31:39 | 阅读(102) |评论(0) | 阅读全文>>

Yahoo Query Language服务

2010-11-11 2:48:15 阅读48 评论0 112010/11 Nov11

Yahoo推出了YQL语言，基本上就是用CSS Selector和XPath的方法来搜集互联网上的资源。

初看这个想法也不是很难（不过做成实际产品了应该有很多挑战），但挺有意思的。

http://developer.yahoo.com/yql/

作者 | 2010-11-11 2:48:15 | 阅读(48) |评论(0) | 阅读全文>>

【转载】动态规划算法的条件

2010-10-31 14:26:00 阅读126 评论0 312010/10 Oct31

动态规划类的算法不是万能钥匙，用它解决具体问题之前得好好分析是否适用。

《算法导论》中提到的流水线装配问题和最长公共子串（LCS）问题就是典型的例子。

Four-step method
1. Characterize the structure of an optimal solution.
2. Recursively define the value of an optimal solution.
3. Compute the value of an optimal solution in a bottom-up fashion.
4. Construct an optimal solution from computed information.

作者 | 2010-10-31 14:26:00 | 阅读(126) |评论(0) | 阅读全文>>