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C#中利用HashSet代替List - 更多技术 - 清泛网 - 专注C/C++及内核技术
...推荐使用List<T>。
这个“小”是多小呢?其实是用Hashtable还是ListDictionary时存在同样的取舍问题,.NET为其设计了HybridDictionary类实现一个混合容器,当数量小于等于8(目前是8,不保证微软以后不会变)的时候,HybridDictionary内部使用...
How to check if a process is running via a batch script
...ame up with, inspired by using grep, is:
tasklist /FI "IMAGENAME eq myapp.exe" 2>NUL | find /I /N "myapp.exe">NUL
if "%ERRORLEVEL%"=="0" echo Program is running
It doesn't need to save an extra file, so I prefer this method.
...
从一个开发的角度看负载均衡和LVS - 更多技术 - 清泛网 - 专注C/C++及内核技术
...端无法感知到后端RS的存在。
3、Full-NAT
无论是DR还是NAT模式,不可避免的都有一个问题:LVS和RS必须在同一个VLAN下,否则LVS无法作为RS的网关。
这引发的两个问题是:
1、同一个VLAN的限制导致运维不方便,跨VLAN的RS...
奇葩职位为何频现互联网? - 资讯 - 清泛网 - 专注C/C++及内核技术
...认为价格战一定还会继续打。任何一个行业,不管是线上还是线下都有价格竞争,我们认为只要用户满意的价格战,该打就打。
◎我们跟途牛网打价格战时,没有考虑过携程的感受(携程是两家公司共同的股东)。我们觉得打得...
How to find the Windows version from the PowerShell command line
...TWARE\Microsoft\Windows NT\CurrentVersion").ReleaseId
Command prompt (CMD.EXE):
Reg Query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v ReleaseId
See also related question on superuser.
As for other Windows versions use systeminfo. Powershell wrapper:
PS C:\> systeminfo /fo csv | Co...
Compiling a java program into an executable [duplicate]
...e just made a simple program with Eclipse and I want to compile it into an executable, but simply can't seem to find out how to do it.
...
实现一个简单的服务端推方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...成了轮询自己,效率不可相提并论,从强奸变成了自慰,还是有进步意义的。相应的,我们可以加快轮询的频率而不会造成太大的压力,从而在根本上提升用户体验。
突然想起另一个有趣的服务端推的做法,不妨在一起唠唠:...
Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...l RTD(real-time data)的技术,使用该技术可以在Excel中实时查看和更新数据。RTD采用所谓的...从Excel 2002开始,微软提供了一种叫做Excel RTD(real-time data)的技术,使用该技术可以在Excel中实时查看和更新数据。RTD采用所谓的“推-...
How can I use PowerShell with the Visual Studio Command Prompt?
...2 for a while now and it's been driving me nuts that I have to punt to cmd.exe when running the VS2010 Command Prompt. I used to have a nice vsvars2008.ps1 script for Visual Studio 2008. Anyone have a vsvars2010.ps1 or something similar?
...
How to request Administrator access inside a batch file
...HITECTURE%" EQU "amd64" (
>nul 2>&1 "%SYSTEMROOT%\SysWOW64\cacls.exe" "%SYSTEMROOT%\SysWOW64\config\system"
) ELSE (
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"
)
REM --> If error flag set, we do not have admin.
if '%errorlevel%' NEQ '0' ...
