japgolly

scalafix

addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.13")

import scalafix.sbt.ScalafixPlugin.autoImport.{scalafixDependencies, scalafixSemanticdb}

scalafixDependencies in ThisBuild += "org.scala-lang.modules" %% "scala-collection-migrations" % "2.1.4",

iravid

import $ivy.`dev.zio::zio:1.0.0-RC8-12`
import $ivy.`dev.zio::zio-streams:1.0.0-RC8-12`

import zio._, zio.stream._

object Step1 {
  import java.nio.file.{Files, Paths, Path}
  import scala.collection.JavaConverters._
  import zio.blocking._

jdegoes

object test {
  import scalaz.zio._

  type UserID = String
  case class UserProfile(name: String)

  // The database module:
  trait Database {
    val database: Database.Service

kubukoz

import cats.effect._

import java.net.InetSocketAddress
import java.nio.channels.AsynchronousChannelGroup
import java.util.concurrent.Executors

import fs2.Stream
import cats.implicits._

non

COLLECTION                              0        1        5       10       50      100      500     1000
Array[Int]                             16       24       40       56      216      416     2016     4016
immutable.BitSet                       24       24       24       24       24       32       96      160
immutable.IntMap[Int]                  16       40      328      688     3568     7168    35968    71968
immutable.List[Int]                    16       56      216      416     2016     4016    20016    40016
immutable.Map[Int,Int]                 16       40      304      720     4856     9680    53504   111760
immutable.Queue[Int]                   40       80      240      440     2040     4040    20040    40040
immutable.Set[Int]                     16       32      264      480     3016     5840    27696    57952
immutable.SortedMap[Int,Int]           40       88      280      520     2440     4840    30008    62008
immutable.SortedSet[Int]               40      104      296      536     2456  

cezarneaga

local ssl certificates that work

motivation

in web dev sometimes you are constrained to develop from behind a https:// local server. i spent two days making this work and i want to write it down here, so that next time apple upgrades OS X and i decide to do a clean install (forgetting to backup certain things) i dont waste this amount of time anymore (i hope).

maybe it helps someone else too. that would make me very happy too.

forget openssl

major pita to remember commands. i don't think there is anything better that makes your mom feel like you are a hacker, than showing her how to type:

johnynek

/*
 * Consider a simple recursive function like:
 * f(x) = if (x > 1) f(x - 1) + x
 *        else 0
 *
 * This function isn't tail recursive (it could be, but let's set that aside for a moment).
 * How can we mechanically, which is to say without thinking about it, convert this into a stack safe recursion?
 * An approach is to model everything that happens after the recursion as a continuation, and build up that
 * continuation in a stack safe manner. Here is some example code:
 */

jdegoes

final case class ZIO[-R, +E, +A](run: R => Either[E, A]) {
  final def map[B](f: A => B): ZIO[R, E, B] = 
    ZIO(r => run(r).map(f))

  final def flatMap[R1 <: R, E1 >: E, B](f: A => ZIO[R1, E1, B]): ZIO[R1, E1, B] = 
    ZIO(r => run(r).flatMap(a => f(a).run(r)))

  final def provide(r: R): ZIO[Any, E, A] = 
    ZIO(_ => run(r))

alexandru

See context.

To configure this script to automatically execute on file changes, save the XML config in ~/Library/LaunchAgents/dot-files.sync.plist then do:

launchctl load -w ~/Library/LaunchAgents/dot-files.sync.plist

djspiewak

Easy Scala Publication

The following describes how you can publish artifacts for any sbt project using the GitHub Package Registry and the sbt-github-packages plugin.

Step 1: Create a GitHub Token

In your GitHub account, go to Settings > Developer settings > Personal access tokens, then click on Generate new token (or click here). Fill in some sort of meaningful name (I chose Dev) and click on the write:packages checkbox: