nadavwr

FROM gitpod/workspace-full
USER gitpod
RUN brew install coursier/formulas/coursier
ENV COURSIER_CACHE /workspace/.coursier/cache/v1

RUN cs setup --yes --jvm 14 --apps sbt-launcher,scala,scalafmt,mill,mill-interactive

jodersky

import scala.deriving._
import scala.compiletime.{erasedValue, summonInline}

// super primitive (but composable via typeclass derivation) JSON reader
trait Reader[A] {
  def read(json: ujson.Value): A
}
object Reader {

  given Reader[Int] = new Reader[Int] {

dbist

CockroachDB and Docker Compose

This is the first in a series of tutorials on CockroachDB and Docker Compose

• Information on CockroachDB can be found here.
• Information on Docker Compose can be found here

1. Install Docker Desktop

Because we already have an official CockroachDB docker image, we will use that in our docker-compose.yml file. We recommend you use one of the current tags instead of latest.

dholtz

final case class CustomArgMsg(key: String, value: String, trackable: Boolean)

jvican

Here's an error that I got spuriously but rerunning the compilation made it go away.

[E] [E1] config/src/main/scala-2.11-13/bloop/config/ConfigCodecs.scala:119:42
[E]      Cannot evaluate a parameter of the 'make' macro call for type 'bloop.config.Config.JvmConfig'. It should not depend on code from the same compilation module where the 'make' macro is called. Use a separated submodule of the project to compile all such dependencies before their usage for generation of codecs. Cause:
[E]      java.lang.AssertionError: assertion failed: pkgClass = package <root>, sym = package com, existing = package com (depth=0)
[E]      L119:     JsonCodecMaker.make[Config.JvmConfig](CodecMakerConfig.withTransientEmpty(false))
[E]                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[E] config/src/main/scala-2.11-13/bloop/config/ConfigCodecs.scala: L119 [E1]

witzatom

#!/bin/bash

# Requirements (on non-EMR machines):
# * init-ctl or systemctl
# * packages python3.6 python3.6-venv python3.6-dev
# * python3 -V has to be 3.6+ (update-alternatives)
# * JAVA_HOME pointing to java 8 (openjdk or oracle)
# * SPARK_HOME set and included in PATH (see https://polynote.org/docs/01-installation.html)

set -ex

jvican

object RuntimeUtils {
  def requestThreadDump: String = {
    // Get the PID of the current JVM process
    val selfName = java.lang.management.ManagementFactory.getRuntimeMXBean().getName()
    val selfPid = selfName.substring(0, selfName.indexOf('@'))

    // Attach to the VM
    import com.sun.tools.attach.VirtualMachine
    import sun.tools.attach.HotSpotVirtualMachine;
    val vm = VirtualMachine.attach(selfPid);

johnynek

// unfortunately
// opaque type Fix[F[_]] = F[Fix[F]]
// won't work (no recursion in opaque type), but this implementation is safe, but scary due to asInstanceOf
object FixImpl {
  type Fix[F[_]]

  inline def fix[F[_]](f: F[Fix[F]]): Fix[F] = f.asInstanceOf[Fix[F]]
  inline def unfix[F[_]](f: Fix[F]): F[Fix[F]] = f.asInstanceOf[F[Fix[F]]]
}

erincandescent

Foreward

This document was originally written several years ago. At the time I was working as an execution core verification engineer at Arm. The following points are coloured heavily by working in and around the execution cores of various processors. Apply a pinch of salt; points contain varying degrees of opinion.

It is still my opinion that RISC-V could be much better designed; though I will also say that if I was building a 32 or 64-bit CPU today I'd likely implement the architecture to benefit from the existing tooling.

Mostly based upon the RISC-V ISA spec v2.0. Some updates have been made for v2.2

Original Foreword: Some Opinion

The RISC-V ISA has pursued minimalism to a fault. There is a large emphasis on minimizing instruction count, normalizing encoding, etc. This pursuit of minimalism has resulted in false orthogonalities (such as reusing the same instruction for branches, calls and returns) and a requirement for superfluous instructions which impacts code density both in terms of size and

Daenyth

import cats.effect.implicits._
import cats.effect.{ConcurrentEffect, ContextShift, IO, Sync}
import cats.implicits._
import com.github.plokhotnyuk.jsoniter_scala.core.{
  JsonValueCodec,
  scanJsonValuesFromStream,
  writeToArray
}
import com.github.plokhotnyuk.jsoniter_scala.macros.{
  CodecMakerConfig,