pigoz / effect-crashcourse

The practical guide I wish existed while learning @effect-ts

Hello,

I'm a software developer based in Italy🇮🇹.

Project co-founder and former maintainer at mpv. I like Ruby, TypeScript, functional programming, and have gotten into Effect lately.

effect-crashcourse's Issues

Suffix for tags?

CustomRandomTag?
CustomRandomService?
CustomRandomSomethingElse?

Wouldn't it be better to add a suffix for that? Thank you

Add "- plain Typescript interfaces" to errors

Because that's what Schema uses https://github.com/Effect-TS/schema/blob/main/src/ParseResult.ts#L25 and I believe FP people (me) are more familiar with plain objects.

Update to effect 3.0

Now that it is stable, is possible a good idea to update the repository

Ensure handling all errors

It would be nice to add an example demonstrating handling all errors with an exhaustive switch (or is Match better?)

"Both are valid alternatives and the choice..."

I would say those approaches are not equal. With Effect, a developer says "This thing has a side-effect." while with Either/Option "This is pure/side-effect free".

A developer should strive for the isolation of pure and impure code. Using Effect everywhere hides/hinders that separation.

Some more feedback

1. Wouldn’t use “stupid” here but rather “naive” or “unsafe”

effect-crashcourse/005-scope.ts

Line 87 in be233fa

export const useFileDescriptorStupid: useFileDescriptor = Effect.gen(function* (

2. “trivial” or “pointless” rather than “stupid”:

effect-crashcourse/006-layer.ts

Line 36 in be233fa

// These are stupid Layers with no lifetime

3. The following bit seems a bit out of place and unclear. Might be better to remove or move to next section. Could also maybe be rephrased if it’s meant to serve as a transition to next section

effect-crashcourse/005-scope.ts

Line 188 in be233fa

* But the point of Layers is to define application wide resources.

Thank you

Really helpfull. Deps are not actual but it's still good. Thank you for writting this.

A little bit of feedback.

Hi @pigoz! First I’d like to say massive thank you for creating this. I’ll be sharing it with my coworkers next week :)

One bit of feedback I’ve got so far: the mention of fibers out of the blue and without further explanation in chapter 2 might leave some readers confused. A single sentence explanation with a link to further info would be a great addition here.