Getting ready

In Swift, syntax is pretty easy, and that's why it is awesome. To extend any type, just type the following:

extension TypeToBeExtended{ 
} 

Inside the curly braces, you can add your extensions to the type to be extended. In extension, you can do the following:

• Adding instance- or class-computed properties
• Adding instance or class methods
• Adding new initializers
• Defining subscripts
• Adding nested types
• Conforming to protocols

Once you create an extension to any type, the new functionality will be available for all instances in the whole project.