todokr

Greatest Hits of jflute

• 所詮、できる人はできる人と一緒に仕事したい

• 仲の良いチームじゃないと成り立たない技術がある

• 任せられるディベロッパー、七つの姿勢

• ホワイトボードを買ってこよう

todokr

(set-language-environment "UTF-8")

;; --------------------------------------------------------------------------------------
;; package management
;; --------------------------------------------------------------------------------------
(require 'package)
;; (add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/") t)
(add-to-list 'package-archives '("melpa-stable" . "http://stable.melpa.org/packages/") t)
(add-to-list 'package-archives '("marmalade" . "http://marmalade-repo.org/packages/"))

todokr

import java.io.BufferedReader;
import java.io.IOException;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Objects;
import java.util.Optional;

import emums.Method;
import exception.BadRequestException;

todokr

trait Food
trait Vegetable extends Food  // 野菜
trait Onion extends Vegetable // 玉ねぎ

class TrashBin[-A]{ // 反変
  def popTrash[B <: A]: B = ??? // 戻り値には上限境界
}

class UserHatesOnion {
  def disposeOnionTo(b: TrashBin[Onion]) = ??? // 玉ねぎ専用のゴミ箱に玉ねぎを捨てるメソッド

todokr

public class Main {

    public static void main(String[] args) throws IOException {
        String cp51932hexString =
            // NEC特殊文字
            "ADA1" + // ①
            "ADB5" + // Ⅰ
            "ADC0" + // ㍉
            "ADE2" + // №
            "ADEA" + // ㈱

todokr

(.toUpperCase "hoge") ; "hoge.toUpperCase();
(.indexOf "hoge" "ge") ; "hoge".indexOf("ge");
(new String "Hello") ; new String("Hello");
(String. "Hello") ; new String("Hello");
(InetAddress/getByName "localhost") ; InetAddress.getByName("localhost")
(.getHostName host) ; host.getHostName();

; StringBuffer sb = new StringBuffer("Hello ");
; sb.append("world");
; sb.append("!!!!!");

todokr

"👨‍👩‍👧‍👧".replace("👩","👨");

todokr

//
// Validation[E, A] represents either:
// - Success[A]
// - Failure[E]
//
// Isomporphic to scala.Either[E, A] and scalaz.\/[E, A]
//
// Unlike \/[E, A], Validation is not a Monad, but an Applicative
// Functor. So if you want to use it as a Monad you can convert back
// and forth using the `validation` and `disjunction` method

todokr

//
// Disjunction - aka Scalaz Either
// \/[A, B] is an alternative to Either[A, B]
// -\/ is Left  (usually represents failure by convention)
// \/- is Right (usually represents success by convention)
// Left or Right - which side of the Disjunction does the "-" appear?
//
// Prefer infix notation to express Disjunction Type v: String \/ Double
//
// References

todokr

import java.io.File

import com.github.tototoshi.csv.CSVWriter

object Mojibake extends App {

  val f = new File("./mojibake-patterns.csv")
  val writer = CSVWriter.open(f)
  val targetString = "入れ替わってる〜!?"
  val encodings = List("UTF-8", "EUC_JP", "Shift-JIS", "ISO-2022-JP")