You can use that repo as a helper kit in iOS development
String
Collections
Enum
Conditions
For-While-Do While Loops
Functions
Struct
Array
Computed and Stored Properties
Closures
Trailing closures
Self in initializers
Static property
Access Control types
Class
Protocols
Extensions
Protocol extension
Protocol Oriented Programming
Optionals
Unwrap Optionals
Guard Let Unwraping Optionals
Force Unwrapping
Implicit Unwrapping
Nil Coalescing
Optional Chaining
Failable Initialize
Type Casting