littlenag

Expressive Metaprogramming for Scala 3

Overview

Scala 3 introduces a new macro system that replaces the experimental Scala 2 system with one that should avoid unsoundness, be simpler to use, and simpler for the compiler team to evolve and maintain.

Perhaps the most significant feature missing from Scala 3 today is the lack of support

pesterhazy

So you want to write a sync system for a web app with offline and realtime support? Good luck. You might find the following resources useful.

Overview articles

• Database in a browser, a spec (Stepan Parunashvili)

  What problem are we trying to solve with a sync system?

• The web of tomorrow (Nikita Prokopov)

debasishg

Thinking differently between frameworks with concrete abstractions (ZIO in Scala) and those with algebras and typeclasses (Haskell / cats & cats-effects in Scala) :-

Using Haskell or Scala cats / cats-effect, which offers libraries based on algebras and typeclasses, we think in terms of the algebra and the appropriate typeclass to model the effect. It's always algebra first - in the following example, we fetch an entity to work with in a domain model. We try fetching from the cache first and if we get a cache miss we reach out for a database based query. With Haskell or cats in Scala, the mantra is using the algebra of an Alternative typeclass.

getAccount = runMaybeT $
      MaybeT (AC.fetchCachedAccount ano) 
  <|> MaybeT (AR.queryAccount ano)

chuwy

import java.time.LocalDateTime

import scala.quoted.*
import scala.deriving.Mirror

import quotidian.*
import quotidian.syntax.*

import io.github.iltotore.iron.*

nilshoenson

#include <metal_stdlib>
#include <SwiftUI/SwiftUI_Metal.h>
using namespace metal;

// Create a horizontal bar
float bar(vector_float2 uv, float start, float height) {
	return step(uv.y, height + start) - step(uv.y, start);
}

// Create waves animation using GLSL

yspreen

/**
 * ContentView.swift
 * StickyTest
 *
 * Created by Nick Spreen (spreen.co) on 5/28/25.
 *
 */

import SwiftUI