daiksy

package util

import java.util.Date
import java.text.SimpleDateFormat

object DateUtil {
  implicit class StringToDate(self: String) {
    /**
     * フォーマット指定された形式でDate型に変換する
     *

daiksy

// コードを読みやすいように名前をつけとこう.
val Up = 0
val Right = 1
val Down = 2
val Left = 3
type Direction = Int

/*
* 石像をあらわすcase class. 像の向きを状態として持つ.
* また、一回の動作で向きが90度回転するという振る舞いも定義.

daiksy

// http://odz.sakura.ne.jp/projecteuler/index.php?cmd=read&page=Problem%2025
// http://projecteuler.net/problem=25

val fib:Stream[BigInt] = BigInt(1) #:: fib.scanLeft(BigInt(1)){(a, b) => a + b }

def getDigits = (n: BigInt) => n.toString.size

fib.takeWhile(getDigits(_) <= 1000).zipWithIndex.find(t => getDigits(t._1) == 1000).get._2 + 1

daiksy

def maxPrime(n: Int) = {
  def isPrime(n: Int) = Iterator.from(2).takeWhile(p => p * p <= n).forall(p => n % p != 0)
  (1 to n).filter(isPrime).max
}

daiksy

(BigInt(100) to BigInt(1) by -1).reduce((x, y) => x * y).toString.toList.map(_.getNumericValue).sum

daiksy

  case class irof (formula: Boolean)(irofBlock: => Unit) {

    formula match {
      case true => irofBlock
      case _ =>
    }

    def elof(elofBlock: => Unit): Unit = {
      formula match {
        case false => elofBlock

daiksy

List list = [
    [color:"blue", weight:10],
    [color:"red", weight:30],
    [color:"blue", weight:50],
]

// Javaで
int weight1 = 0;
for (def e : list) {
    if ("blue".equals(e.color))

daiksy

trait hentaiConverter {

  implicit def stringToHentaiChecker(s: String) = HentaiChecker(s)

  case class HentaiChecker(s: String) {
    def hentaiPower: Int = {
      import scala.io.Source
      val contents = Source.fromURL("http://www.google.co.jp/search?q=変態+%s".format(s), "utf8").getLines.mkString

      val searchCountPattern = "約? ?([0-9,]+) ?件".r

daiksy

trait hentaiConverter {

  implicit def stringToHentaiChecker(s: String) = HentaiChecker(s)

  case class HentaiChecker(s: String) {
    def isHentai: Boolean = s == "変態"
  }

}

daiksy

  /**
   * http://projecteuler.net/problem=16
   * http://odz.sakura.ne.jp/projecteuler/index.php?cmd=read&page=Problem%2016
   */

  val pow = (base: Int, n: Int) => {
    def calc(base: Int, n: Int, summary: BigInt): BigInt = {
      n match {
        case 1 => summary * base
        case _ => calc(base, n - 1, summary * base)