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Ora-00257 错误处理一列 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
Ora-00257 错误处理一列sqlplus assysdba报错ORA-12162切回系统确认系统当前的ORACLE_HOME和ORACLE_SID环境变量[oracle@asdlabdb01~]$echo$ORACLE_HOME空的[oracle...sqlplus /as sysdba
报错ORA-12162
切回系统
确认系统当前的ORACLE_HOME和ORACLE_SID环境变量
[oracle...
Python中的X[:,0]和X[:,1] - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
Python中的X[:,0]和X[:,1]X[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维数组第一维中的所有数据，第二维中取第0个数据，直观来说，X[:,0]就是取所有 X[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维...
oracle10g 网址收藏 - ORACLE - 清泛IT论坛，有思想、有深度
...果通过迅雷进行下载，就不用登陆OTN了：
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_client_wi...
ItemsControl with horizontal orientation
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470
Simply change the panel used to host the items:
<ItemsControl ...>
<ItemsControl.I...
Converting NumPy array into Python List structure?
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answered Dec 27 '09 at 15:31
Peter HansenPeter Hansen
18.1k22 gold badges4343 silver badges6868 bronze badges
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Position Absolute + Scrolling
...s:
.inner: { position: relative; height: auto; }
.full-height: { height: 100%; }
Setting the inner div's position to relative makes the absolutely position elements inside of it base their position and height on it rather than on the .container div, which has a fixed height. Without the inner, re...
When should I use Struct vs. OpenStruct?
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180
With an OpenStruct, you can arbitrarily create attributes. A Struct, on the other hand, must ha...
Calculating frames per second in a game
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100
You need a smoothed average, the easiest way is to take the current answer (the time to draw th...
Get exit code of a background process
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130
1: In bash, $! holds the PID of the last background process that was executed. That will tell y...
'printf' vs. 'cout' in C++
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360
I'm surprised that everyone in this question claims that std::cout is way better than printf, ev...