Before we discuss immutability, let's start by answering a question:
What datatype is more secure to work with in a multithreaded environment?
- Variable datatype, which can be changed over time, or
- Constant datatype, which cannot be changed once populated
Let me try to explain the question with the help of an example—suppose you had a variable dictionary of position coordinates:
var locationDictionary = ["latitude": 131.93839, "longitude": 32.83838]
locationDictionary is the location of the user that gets populated once every five minutes; this locationDictionary will, at some time in the near future, be converted to a locations JSON object and synced to the backend (an API pushing data to the server) from where the location ...
