ikhoon

import org.junit.Test;

import java.time.Instant;
import java.time.OffsetDateTime;
import java.time.ZonedDateTime;
import java.time.format.DateTimeParseException;


public class Java8TimeTest {
    private String instantFormat = "2007-12-03T10:14:30.000Z";

ikhoon

object TwiiterScalaFutureOps {

  import TwitterScalaFutureConverters._
  implicit class ScalaToTwitterFuture[T](f: Future[T]) {
    def toTwitterFuture: twitter.Future[T] = scalaToTwitterFuture(f)
  }

  implicit class TwitterToScalaFuture[T](f: twitter.Future[T]) {
    def toScalaFuture: Future[T] = twitterToScalaFuture(f)
  }

ikhoon

import org.reactivestreams.{Processor, Publisher, Subscriber, Subscription}

// 데이터 생성
val publisher = new Publisher[Int] {
  def subscribe(s: Subscriber[_ >: Int]) = {
    (1 to 100).foreach { x =>
      s.onNext(x)
    }
    s.onComplete()
  }

ikhoon

스칼라 컨퍼런스 2017

• 아카 리더, 할리 지인 Konrad의 "The best is yet to come - State of Akka in 2017" http://event.scaladays.org/scaladays-cph-2017#!#schedulePopupExtras-8119

• 스칼라 매스크로 창시자, Eugene의 "Building code analysis tools at Twitter" http://event.scaladays.org/scaladays-cph-2017#!#schedulePopupExtras-8130

• 스칼라 컴파일시간 줄일수 있는 팁을 준다함 http://event.scaladays.org/scaladays-cph-2017#!#schedulePopupExtras-8141

ikhoon

Learning Materials for generic & dependent programming using shapeless

Official

• Shapeless wiki

Book

• The Type Astronaut’s Guide

Workshop

• Shapeless for mortals

ikhoon

Scala Workshop 2019

Basic? Scala

• Scala Exercises
• Functional Programming in Scala | Coursera
• Function
• Partial function
• Curry
• HOF
• for expression
• Future,

ikhoon

String foo() {
    return "abc";
}

String foo(Supplier<String> s) {
    System.out.println(s);
    return "abc " + s.get();
}

@Test

ikhoon

org.hamcrest:hamcrest:2.1
   variant "default" [
      org.gradle.status = release (not requested)
   ]

org.hamcrest:hamcrest:2.1
\--- org.awaitility:awaitility:4.0.1
     \--- allDependencies (requested org.awaitility:awaitility)

org.hamcrest:hamcrest-core:1.3

ikhoon

# git checkout remote pull request to local branch and track it with FZF-TMUX
# Requirements:
# - hub : https://github.com/github/hub
# - fzf-tmux : https://github.com/junegunn/fzf#fzf-tmux-script
pr() {
  local pr_list pr_id origin branch_name
  pr_list=$(cat /dev/null | hub pr list -f "%pC%>(8)%i%Creset %t @%au %l%n")
  result=$?
  if [[ $pr_list == *"github.com username:"* ]]; then
    echo "Please run 'hub pr list' to login GitHub"

ikhoon

package category

import java.util.concurrent.CompletableFuture

object Functors {
  // Monad 핵심: 많이 쓰인다.
  // A => B, F[A] => (A => B), => F[B]

  // Map Pair(A, B)
  // type class, 특정 타입에 기반된 행위