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Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
... small snippet of vectorizable math.
Run their benchmark flipping between -XX:-UseSuperWord and -XX:+UseSuperWord(default)
If no difference in performance is observed, your code probably didn't get vectorized
To make sure, run your benchmark such that it prints out the assembly. On linux you can enj...
HTTP status code for update and delete?
...st, but is not returning any content
Source: List of HTTP status codes: 2xx Success
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How to split long commands over multiple lines in PowerShell
... Web Deploy\msdeploy.exe" `
-verb:sync `
-source:contentPath="c:\workspace\xxx\master\Build\_PublishedWebsites\xxx.Web" `
-dest:contentPath="c:\websites\xxx\wwwroot,computerName=192.168.1.1,username=administrator,password=xxx"
White space matters. The required format is Space`Enter.
...
Extracting the last n characters from a string in R
... on Andrie's code)
substrRight <- function(x, n){
sapply(x, function(xx)
substr(xx, (nchar(xx)-n+1), nchar(xx))
)
}
> substrRight(c("12345","ABCDE"),2)
12345 ABCDE
"45" "DE"
Note that I have changed (nchar(x)-n) to (nchar(x)-n+1) to get n characters.
...
passing xxx as \'this\' argument of xxx discards qualifiers - C/C++ - 清泛网 - 专注C/C++及内核技术
passing xxx as 'this' argument of xxx discards qualifiers这是由于常量对象调用了非常量成员函数引起的错误,错误原因在于常量对象只能调用常量成员函数(因为常量成员函数约定不对非静态成员进行修改...这是由于常量对象调用了非常量成...
__declspec(dllexport) 导出符号解决链接失败问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ctor'(unsigned int)" (??_GCBtt@@QAEPAXI@Z) 中被引用
1>../outdir/Debug/xxx.exe : fatal error LNK1120: 2 个无法解析的外部命令
的编译错误。
原因是引用的dll中的函数没有导出导致，可以用Depends打开dll查看验证，使用如下的宏申明解决：
#ifdef _E...
【解决】eclipse新建项目报错：overlaps the location of another project:...
...】eclipse新建项目报错：overlaps the location of another project: 'xxx'eclipse-error-overlaps-the-location-of-another-projectEclipse新建项目时报错：overlaps the location of another project: & 39;xxx& 39;，确保workspace下没有重复的工程，但之前曾经添加并删除过，...
【解决】Error 701: Unable to load xxx.xxx - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
Error 701: Unable to load xxx.xxx
比如：
【解决】：连接菜单 -> 重置连接。然后再重新连接一次AI伴侣进行测试，就能解决。
【原理】：在AI伴侣已经连接好之后，访问才刚上传的某资源，就会报这个错误。因为资源不会自...
Understanding REST: Verbs, error codes, and authentication
...b page.
Point 3: How to return error messages and codes
Consider the 4xx or 5xx HTTP status codes as error categories. You can elaborate the error in the body.
Failed to Connect to Database: / Incorrect Database Login: In general you should use a 500 error for these types of errors. This is a ...
Getting the IP address of the current machine using Java
...Interfaces, but how do i distinguish them?
Any address in the range 127.xxx.xxx.xxx is a "loopback" address. It is only visible to "this" host.
Any address in the range 192.168.xxx.xxx is a private (aka site local) IP address. These are reserved for use within an organization. The same applies...