How to create list, who can contains function [closed] - c++

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How to create list, who can contains function with signature int foo(int x);, functors with defined int operator()(int x); and functors from std::bind1st.

use std::list<std::function<int(int)>>

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QComboBox::showPopup() with no animation [closed]

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Is there a simple way to use QComboBox::showPopup() without the animation making it instant?
See code:
QApplication::setEffectEnabled(Qt::UI_AnimateCombo, false);

Regex:password all character are allowed,but not include space [closed]

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Regex:password all character are allowed,but not include space,length is 8-16.please give me an efftive help.
Consider the following Regex...
^\S{8,16}$
Good Luck!

I need to hide QTableWidget by default [closed]

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I need to hide the entire QTableWidget and show it. I didn't find the same function for both in its documentation. Do you have any idea?
QTableWidget is a QWidget. Just use the hide() function.

C++ Reading File with bunzip2 [closed]

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#include<fstream>
int main()
{
ifstream fFeedList;
fFeedList.open("/ra/file");
return 0;
}
How to read files with .bz2 in C++? Thanks!!
Take a look at the Boost iostreams library, it can decompress bzip etc.

How drop packet with libiptc in c++? [closed]

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Closed 8 years ago.
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Is there a way to drop packets with libiptc c++?,i want a sample code for drop packet with libiptc in c++.
for this you should write a driver.
for example you can use main_hook function.