js-proposal-algebraic-effects VS gopl.io

I have to admit: you're perfectly right here. React of course always relied on mutable state in it's implementation – just so we don't have to. I derailed a lot here to keep this funny thread going ;) I'm still not with you on your definition of "functional", since you treated it synonymously with "purely functional". Functional means just made by applying and composing functions, and react UI is created exactly like that. There is an awesome algebraic effects proposal[1], which will hopefully will be added to JavaScript one day, then react will make use of it to become purely functional.

1: https://github.com/macabeus/js-proposal-algebraic-effects

Super interesting, there is a proposal to add this to JavaScript and several languages that use this, unison, koka & eff. I had no idea this was even a thing!

Ok I was wrongly assuming that panic was expecting an error type, in fact it's an interface{}.

> Your use of exceptions for flow control (i.e. goto) is considered harmful

Exceptions are a way to delegate error handling to the caller by giving them informations about the unexpected behavior. It implies that the expected behavior is the "happy path" (everything went well) and any deviations (errors) is unexpected.

This is far from a goto because you can have `try/finally` blocks without catch (or defer in golang).

Also, exceptions are just a kind of algebraic effects that do not resume. There was a proposal to JS for this: https://github.com/macabeus/js-proposal-algebraic-effects

This is also easier to test. assertRaises(ErrorType, func() { code... })

Almost every Go library I've seen just return an error (which is just a string), you'd need to parse it to assert that the correct error is returned in special conditions.

Go never changed as much as Java does in each major release, so old books are still relevant. https://www.gopl.io/ is fine if you read about generics and some new standard library modules somewhere else later.

The Go Programming Language book.

The GOPL book is good one to start with, if you prefer reading books. https://www.gopl.io/

Not that they are leet code style, but some exercises from "The Go Programming Language" are really worth having a look at, also most solutions are available at https://github.com/adonovan/gopl.io

What part(s) are you struggling with and how are you learning? The Go Programming Language is slightly outdated but is an excellent intro. You can read the first chapter free. Also the resources on https://go.dev/learn/ are great. If I were you, I would come up with an idea you're excited about and build it.

For a deeper dive, I’d recommend The Go Programming Language - a fantastic resource covering a broader landscape of the language than just concurrency.

"Low-level programming" is chapter 13, both in the version I have and on https://www.gopl.io/ -- the rest is all somewhat crucial stuff, except for maybe reflection.

Is this the "The Go Programming Language" you mentioned?