yagince

import sbt._
import Keys._

object BaseSettings {
  val buildName = "MyProject"
  val buildOrg  = "yagince"
  val buildVersion = "0.0.1"
  val buildScalaVersion = "2.10.1"

  val settings = Seq(

yagince

package interpolation

object StringInterpolation_01 extends App {
  val hoge = "hoge"
  println(s"Hello $hoge!")
}

yagince

package interpolation

object StringInterpolation_02 extends App {

  println(s"${1 + 1}")

  def test = 1 + 1

  println(s"${test}")
  println(s"$test")

yagince

package interpolation

object StringInterpolation_03 extends App{
  // format

  val pi = 3.14
  val hoge = "hogehogehoge"

  println(f"$hoge is $pi%2.4f") // => hogehogehoge is 3.1400
  //println(f"$hoge is $pi%2.4d") // これはpiがDoubleなので、エラーになる

yagince

package interpolation

object StringInterpolation_04 extends App {
  println(s"100 + 1 = ${100+1}")                       // 100 + 1 = 101
  println(StringContext("100 + 1 = ", "").s(100+1))    // 100 + 1 = 101
  println(StringContext("100 + 1 = ", "%5d").f(100+1)) // 100 + 1 =   101
}

yagince

package implicitclass

object ImplicitClass_01 extends App {
  implicit class DoubleInt(i: Int) {
    def double = i * 2
  }
  println(1.double)

  class HalfInt(i: Int) {
    def half = i / 2

yagince

package implicitclass

object ImplicitClasses {
  implicit class TripleInt(i: Int) {
    def triple = i * 3
  }
}

// こうは書けない
//implicit class TripleInt(i: Int) {

yagince

package valueclass

class Double(val i: Int) extends AnyVal with Hoge{
//  val tmpDouble = i * 2 // これは定義できない
  def double = i*2

  // 以下はコンパイルエラー
//  object Foo {
//    val foo = "foo"
//  }

yagince

package valueclass.implicitclass

object ImplicitConversions {
  implicit class Triple(val i: Int) extends AnyVal {
    def triple = i * 3
  }
  class Half(val i:Int) extends AnyVal {
    def half = i / 2
  }
  implicit def toHalf(i: Int) = new Half(i)

yagince

package valueclass.memory.array

object ValueClass_04 extends App {
  case class Hoge(val hoge: String) extends AnyVal

  val hoge = Hoge("aaaa").hoge
  val array = Array[Hoge](Hoge("str"))
  val list = List[Hoge](Hoge("str"))
  val seq = Seq[Hoge](Hoge("str"))
  val set = Set[Hoge](Hoge("str"))