The Fission Theory: This theory proposes that the Moon was once part of the Earth and somehow separated from the Earth early in the history of the solar system.
This provides modular approach to programming. Classes. A class is a concept used in object oriented programming languages such as C++, PHP, and JAVA etc. Apart from holding data, a class is also used to hold functions. An object is an instant of a class. In case of variables, the type is the class whereas the variable is the object.
We touched a bit on this in a previous post Classes In Swift â An Introduction. To recap what was mentioned in that post, methods are functions that are associated with a type. In other words, all methods are functions, but not all functions are methods. Functions can be written outside of the context of a type, especially in playgrounds.