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如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...启supplemental logging，默认是没有开启的。
conn / as sysdba
--安装LOGMINER
SQL> @$ORACLE_HOME/rdbms/admin/dbmslmd.sql;
SQL> @$ORACLE_HOME/rdbms/admin/dbmslm.sql;
SQL> @$ORACLE_HOME/rdbms/admin/dbmslms.sql;
SQL> @$ORACLE_HOME/rdbms/admin/prvtlm.plb;
--开启附加日志
alter ...
Solving “Who owns the Zebra” programmatically?
...
Here's a solution in Python based on constraint-programming:
from constraint import AllDifferentConstraint, InSetConstraint, Problem
# variables
colors = "blue red green white yellow".split()
nationalities = "Norwegian German Dane Swede English".split()
pet...
pdf2htmlEX实现pdf转html - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...想。下面两张图片是html和pdf视图下的截图：
windows下载地址：pdf2htmlEX-v1.0-win32-static
本人开发的一个功能：文档在线阅读，要求能够支持移动终端浏览器在线阅读。考虑过将文档先转pdf，然后在将pdf转swf，利用flexpaper在前...
Which is faster: Stack allocation or Heap allocation
This question may sound fairly elementary, but this is a debate I had with another developer I work with.
23 Answers
...
VS2005混合编译ARM汇编代码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...olFile>
将上面的代码复制到记事本中，并将其保存到vs2005安装目录的Microsoft Visual Studio 8/VC/VCProjectDefaults文件夹下，命名为armcc.rules
二. 在VS2005中添加编译规则
选择需要和ARM汇编代码做混合编译的Project，右键弹出的菜单中选...
Why does changing 0.1f to 0 slow down performance by 10x?
... on whether 0 or 0.1 is used.
Here's the test code compiled on x64:
int main() {
double start = omp_get_wtime();
const float x[16]={1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0,2.1,2.2,2.3,2.4,2.5,2.6};
const float z[16]={1.123,1.234,1.345,156.467,1.578,1.689,1.790,1.812,1.923,2.034,2.145...
libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...置
基准测试非常简单：首先创建多个套接字对，然后安装这些对的事件观察器，然后（较少）数量的“活动客户端”在这些套接字的子集上发送和接收数据。
使用的基准程序是bench.c，取自 libevent 发行版，经过修改以收集每...
技术和资本玩转创客圈 英特尔在中国的动作才刚刚开始 - 资讯 - 清泛网 - 专...
...戏、玩具、体验、3D打印等领域。
比如可以通过简单的安装操作对普通滑雪板进行智能升级的SKIIN，就是从创意到原型、再到通过“硬享公社”平台的对接功能成为落地商品的。SKIIN可以识别滑雪者的动作，上传至APP随时回放，...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...”
Determining the size of the image on the screen
Details on fixed vs. responsive sizing
In summary: What MIT App Inventor Programmers Should Do
Synopsis: App Inventor works best if you use images whose size matches the size you want them to appear on your screen...
What is the difference between graph search and tree search?
...n
}
return next
Depending on how you implement select from open, you obtain different variants of search algorithms, like depth-first search (DFS) (pick newest element), breadth first search (BFS) (pick oldest element) or uniform cost search (pick element with lowest path cost), the popular A-sta...