re: What Do You Think About Immutable Data? VIEW POST

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Robert "Uncle Bob" Martin discussed three programming paradigms in his book, Clean Architecture.

  1. SP (Sturectured Programming)
  2. OOP (Object-oriented Programming)
  3. FP (Functional Programming)

Each one provided programmers "constraints".

  1. SP - A direct/explicit transfer of control (goto is discouraged)
  2. OOP - An indirect transfer of control (function pointers are eliminated)
  3. FP - A variable assignment (cannot assign a new value one initialized)

To understand why immutable data is being popular,
let's see how aforementioned "constraints" help us.

  1. SP - with removal of goto in our code, we can see flow of our code better
  2. OOP- We have a complete control over code dependencies and flows
  3. FP - All race/deadlock conditions, concurrent update problems go away

Front-end world has evolved very quickly and requires many code to run in parallel or asynchronously.
Websites aren't just about onClick-do-this simple any more.
IMHO, immutable data became popular to keep our state in consistent state & also provide other benefits such as memoization, time travel, etc

 

Thanks for the awesome comment. I really enjoyed it as a whole but I will highlight a few parts for further discussion if you don't mind.

"to keep our state in consistent state"

This is a bit vague for me. How is mutable state inconsistent?

"All race/deadlock conditions, concurrent update problems go away"

This is true for multi-threaded languages but I don't think this is an issue in case of (the mostly single-threaded) JavaScript.

"also provide other benefits such as memoization, time travel, etc"

I totally agree with this one, immutable updates really shine here.

PS: Thanks for the link to the book.

 

Thanks for the feedback, Miklos.

This is a bit vague for me. How is mutable state inconsistent?

What I meant was variables don't change thus wherever you access that variable, it's always the same (consistent).
Maybe it came out wrong 😅

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