In Java you can make classes inherit properties(methods, variables, etc.) of another class. Classes that inherit properties are called sub classes (child classes) and classes that are inherited from are called superclasses. A subclass can only inherit one superclass.

In the default settings the session id will be displayed in the url. If someone sees the session id, then he can login into your login session using the session id which can be seen through e.g. scanning a wifi network (Wireshark).

This is a Javascript code which allows you to display every line of an external text file (will be fetched from an URL) in an unordered <ul> HTML list. You can use this to display, for example, news headlines on this jQuery news ticker that is available on Github:

Convert Python applications to an executable program. (Such as exe Windows, dmg Mac, rpm Linux). This tutorial uses pyinstaller to create an executable for your Python application and allow to distribute your Python application more easily. If you use Pyinstaller then you do not need to have an python installer installed to run the created exe. Pyinstaller If you do want an alternative which has also an included Python interpreter, optimized executable file size and more advanced features, then you can also use "Cx_freeze", which is discussed below in an own part of this tutorial. Install pyinstaller (creates standalone executables