Arakaki

import com.jcraft.jsch.{Session, ChannelSftp, JSch}

object App {
  def using[A,B]( resource:A )( func: A => B )( endAction: A => Unit ){
    try {
      func(resource)
    }catch{
      case e:Exception => e.printStackTrace()
    } finally {
      endAction(resource)

Arakaki

import com.jcraft.jsch.{Session, ChannelSftp, JSch}

object App {
  def using(s: Session)(f: Session => Any){
    try {
      f(s)
    }catch{
      case e:Exception => e.printStackTrace
    } finally {
      s.disconnect()

Arakaki

##環境 MySQL 5.5.20

##SQL //NG select m.id as i_on_m, m.name as n_on_m, m.company_id as ci_on_m , cnt.id as i_on_cnt, cnt.name as n_on_cnt , cmp.id as i_on_cmp, cmp.name as n_on_cmp, cmp.country_id as ci_on_cmp from members m inner join countries cnt on cmp.country_id = cnt.id left join companies cmp on m.company_id = cmp.id order by m.id //OK select m.id as i_on_m, m.name as n_on_m, m.company_id as ci_on_m , cnt.id as i_on_cnt, cnt.name as n_on_cnt , cmp.id as i_on_cmp, cmp.name as n_on_cmp, cmp.country_id as ci_on_cmp from members m left join companies cmp on m.company_id = cmp.id inner join countries cnt on cmp.country_id = cnt.id order by m.id

Arakaki

##前提 Windows上でskinny-blank-appから起動するこを前提としています。 他の方法から起動されるかたは置き換えて見て下さい。

##SBTにデバッグオプションを追加 sbt.batに下記のオプションを追加します。 ※address(ポート番号)は任意です。 -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005

デフォルトであれば下記の様になっているかと思います。

Arakaki

select *
 from db1.book as x,
      db2.author as y
 where x.id=y.book_id

Arakaki

object Main {
  def main(args:Array[String]) {
    //Duck typing
    def quackTheDuck( quackable: {def quack:String }) = {
      "What does a duck say? " + quackable.quack
    }
    class RealDuck { def quack = "Quack!" }
    class ImposterDuck { def quack = "Qwaack!" }
    quackTheDuck(new RealDuck)
    quackTheDuck(new ImposterDuck)

Arakaki

object Main {
  def main(args:Array[String]) {
    //Pimp my library
    implicit class SuperInt(val i:Int) {
      def square = i * i
      def sqrt = math.sqrt(i)
    }

    println(7.square,49.sqrt)
  }

Arakaki

object Main {
  def main(args:Array[String]) {
    //easy interfaces / mixins     
    trait Namable { val name:String; def greet:String = s"Hi $name!"}

    //lazy evaluation    
    trait Randomable { lazy val rand:Int = (math.random * 100).toInt }

    //easy class definition, support for mixins using traits     
    case class Person(name:String, favoriteLanguage:String) extends Namable with Randomable

Arakaki

object Main {
  def main(args:Array[String]) {

    def addNumbers(x:Int)(y:Int)= x + y
    val addNumber = addNumbers(2)_
    val value = addNumber(2)


  }
}

Arakaki

object App {
  def main(args : Array[String]) {
    case class Structure(campaign:String,creative:String,imp:Int,click:Int,conv:Int,cost:Int)

    val structures = List(
      Structure("testcampaign001","testcreative001",1,1,1,1),
      Structure("testcampaign002","testcreative004",1,1,1,1),
      Structure("testcampaign003","testcreative005",1,1,1,1),
      Structure("testcampaign004","testcreative003",1,1,1,1),
      Structure("testcampaign004","testcreative001",1,1,1,1),