<input type=”submit” name=”submit” value=”submit”> There are so many submit in the input tag, what do they mean? We often use <input> in a form to transfer back some user input […]

I have little knowledge about ipv6 address. All I know is that it is longer than ipv4 address thus can be assigned to more hosts in the world. ipv6 addresses […]

The idea behind dkim is simple. You add a “DKIM-Signature:” in your email message. The stmp server receiving the email checks the header, pulls the dns record of the domain, […]

sha256 is an algorithm to map a string of any length to a 256bit string(so called hash). The input of the algorithm is a string of any length but the […]

Many qt image related classes allow you to load an image from a file such as: QIcon ButtonIcon(“myprogrammingnotes.com.ico”); button->setIcon(ButtonIcon); Or, QPixmap pixmap(“myprogrammingnotes.com.ico”); QIcon ButtonIcon(pixmap); button->setIcon(ButtonIcon); That is very convenient. But […]

If you do not set an icon for your qt project, the built exe has a default icon, which seems a blank window. If you run the program, the icon […]