gkojax

package org.example

import org.apache.log4j.Logger

object Log4jproject extends App {
	val logger: Logger = Logger.getLogger(this.getClass.getName)
	logger.info("log4j test") 
}

gkojax

val op: Pair[BigInt, BigInt] = Pair(1, 1)

(0 until 10).foldLeft(op) { (ab, x) =>
  println(ab._1)
  Pair[BigInt, BigInt](ab._2, ab._2 + ab._1)
}

gkojax

import scala.util.control.Exception._

object Main {
  def main(args : Array[String]) : Unit = {
    args.toList.filter(allCatch either _.toInt isRight).sorted.foreach(println)
  }
}

// 数値かどうかをチェックするのに、toInt関数を呼んで例外が発生するかどうかでチェックするとか
// 良いやりかたでは無いと思います。

gkojax

import sbt._
import sbt.Keys._

object Scala210Build extends Build {

  lazy val scala210 = Project(
    id = "scala-210",
    base = file("."),
    settings = Project.defaultSettings ++ Seq(
      name := "Scala 210",

gkojax

import scalaz._, Scalaz._
import java.util.Date
case class Student(name: String, grade: Int, birthday: Date)
object Student {
  implicit object StudentInstance extends Show[Student] with Order[Student] {
    def show(s: Student) = s.toString.toList
    def order(s1: Student, s2: Student) =
      s1.grade ?|? s2.grade |+| s1.birthday ?|? s2.birthday
  }

gkojax

def string2Int(sizeString: Option[String]): Option[Int] = {
  sizeString match {
    case Some(a) =>
      try {
        val size = a.toInt
        Option(size)
      } catch {
        case _ =>
          None
      }

gkojax

import org.specs2.mutable._
import org.specs2.specification._
import org.mockito.Mockito._
import com.mongodb.casbah.Imports._
import com.twitter.finagle.http._
import com.twitter.finagle.http.path._
import com.twitter.finagle.{ Service, Filter, SimpleFilter }
import com.twitter.util.{ Future, FuturePool, Eval }
import scala.util.control.Exception._

gkojax

import com.twitter.sbt._

organization := "com.example"

name := "Finagle Http Project"

version := "0.1.0"

scalaVersion := "2.9.2"

gkojax

val addUmm: String => String = _ + " umm"
val addAhem: String => String = _ + " ahem"
val ummThenAhem = addAhem.compose(addUmm)

def addUmm2(x: String) = x + " umm"
def addAhem2(x: String) = x + " ahem"
val ummThenAhem2 = (addAhem2 _).compose(addUmm2 _)

gkojax

List(Random.nextInt(size), Random.nextInt(size), Random.nextInt(size))

// はもうちょっとかっこよくかける気がする。