需求:表中同一个uid(用户)拥有多条游戏等级记录,现需要取所有用户最高等级(level)的那一条数据,且时间(time)越早排越前。这是典型的排名表+------+-------+--------------+---------------------+| uid | level | role ....
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数据库 时间:
2014-07-22 22:58:16
阅读次数:
380
什么是APS? APS:Advanced Planning and Scheduling 高级计划与排程 APS:Advanced Planning System 高级计划系统 任务:根据人力限制、设备限制、采购限制与外协限制合理安排生产计划 基础模型: 某部件某工序的生产资源可能是纯人力、纯设备+...
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其他好文 时间:
2014-07-22 22:56:32
阅读次数:
188
ZigBee is a specification for a suite of high level communication protocols used to create personal area networks built from small, low-power digital ...
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其他好文 时间:
2014-07-19 20:37:21
阅读次数:
212
Description
Advanced Cargo Movement, Ltd. uses trucks of different types. Some trucks are used for vegetable delivery, other for furniture, or for bricks. The company has its own code describing ea...
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其他好文 时间:
2014-07-18 23:10:11
阅读次数:
304
转载的:今天在网上看到一个关于加密算法的安全性及破解复杂度的表格,特摘录下来以便日后参考使用,原表是英文的,这里直接翻译成中文方便查阅。另外还找了一些关于密码学相关的信息,附录在后。加密算法的安全级别(Security Level of Cryptographic Algorithms) 安全级别 ...
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其他好文 时间:
2014-07-18 20:36:05
阅读次数:
512
Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root).For exa...
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其他好文 时间:
2014-07-18 20:06:13
阅读次数:
255
也可以参考:http://blog.csdn.net/chszs/article/details/8125828
分类:
编程语言 时间:
2014-07-17 13:33:17
阅读次数:
205
引用:http://www.cnblogs.com/vamei/archive/2012/09/19/2692452.htmlLinux架构我以下图为基础,说明Linux的架构(architecture)。(该图参考《Advanced Programming in Unix Environment》...
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系统相关 时间:
2014-07-16 18:16:36
阅读次数:
268
Description
Jimmy is studying Advanced Graph Algorithms at his university. His most recent assignment is to find a maximum matching in a special kind of graph. This graph is undirected, has N verti...
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其他好文 时间:
2014-07-16 14:34:42
阅读次数:
239
介绍
在谷歌的官网我们可以看到它是这样介绍的:RecyclerView is
a more advanced and flexible version of ListView.
This widget is a container for large sets of views that can be recycled and scrolled very efficiently....
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移动开发 时间:
2014-07-16 10:33:38
阅读次数:
267