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C++ Tuple vs Struct
... the differences in term of performance between tuple and struct. We first start with a default struct and a tuple.
struct StructData {
int X;
int Y;
double Cost;
std::string Label;
bool operator==(const StructData &rhs) {
return std::tie(X,Y,Cost, Label) == std::t...
Cookies vs. sessions
I started using PHP a couple of months ago. For the sake of creating a login system for my website, I read about cookies and sessions and their differences (cookies are stored in the user's browser and sessions on the server). At that time, I preferred cookies (and who does not like cookies?!) and j...
Daemon Threads Explanation
...e GUI with the updated count.
Sleep for a little while.
When your widget starts up, it would create this thread, designate it a daemon, and start it. Because it's a daemon, you don't have to think about it; when your widget exits, the thread will stop automatically.
...
How do I create 7-Zip archives with .NET?
...arp is slow. At the moment the most recommended solution is to use Process.Start("7z.exe......)
– klm_
Oct 1 '17 at 7:34
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Javascript AES encryption [closed]
...
JSAES is a good starting point but it can be used only to encrypt 16 bytes of data. If you want to encrypt bigger block of data you have to extend it yourself to implement intialization vector, encrypt mode (CBC or other...), padding.
...
How to install packages using pip according to the requirements.txt file from a local directory?
...and it asks the pip to install from the given requirements file.
pip will start installation only after checking the availability of all listed items in the requirements file and it won't start installation even if one requirement is unavailable.
One workaround to install the available packages is...
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
...p.ini
下面我们就要启动PHP-FPM
#/usr/local/php/sbin/php-fpm start
在启动PHP-FPM时会报上面这个错误，原因是PHP-FPM自己不知道以那个用户和组运行PHP，所以我们要修改一个文件，把文件中的注释去掉即可（打开文件把红色部分删除...
How to overwrite the previous print to stdout in python?
...
One way is to use the carriage return ('\r') character to return to the start of the line without advancing to the next line:
for x in range(10):
print '{0}\r'.format(x),
print
The comma at the end of the print statement tells it not to go to the next line. The last print statement advances ...
What's the difference between commit() and apply() in SharedPreferences
...mmits its
changes to the in-memory
SharedPreferences immediately but
starts an asynchronous commit to disk
and you won't be notified of any
failures. If another editor on this
SharedPreferences does a regular
commit() while a apply() is still
outstanding, the commit() will block
un...
Why is Java's boolean primitive size not defined?
...ome imprecision):
static Runtime runtime = Runtime.getRuntime();
...
long start, end;
Object obj;
runtime.gc();
start = runtime.freememory();
obj = new Object(); // Or whatever you want to look at
end = runtime.freememory();
System.out.println("That took " + (start-end) + " bytes.");
...