Scalaのコード一覧 | Codetter（こーどったー）

val regex = "([0-9]+.[0-9]+.[0-9]+.[0-9]+).*([0-3][0-9].[A-Z][a-z][a-z].20[0-1][0-9]:[0-2][0-9]:[0-5][0-9]:[0-5][0-9]).*".r;

scala.io.Source.fromFile("./access_log").getLines().foreach( x => { x match { case regex(ip,date) => {println(ip +" at " + date) } case _ => println("no match") }}

import java.text.{SimpleDateFormat => SDF}

val sdf = new SDF("yyyy-MM-dd'T'HH:mm:ssZ")

def convertInt(x: String) = x.toInt

/**
  * 謎言語ウキャス
  *  こんにちわ →  ᓦᐓᔦᐓᓾᐓᓴᐓᔢᐓ
  *  吾輩は猫である。名前はまだ無い。 → ᗟᐡᓢᐹᔂᐓᑙᐮᓺᐓᓕᐓᔞᐓ。ᖮᐡ᙭ᐠᔂᐓᔑᐓᓳᐓᓎᐭᓗᐓ。
  *  謎言語ウキャスは、@yuroyoroがScalaでテキトーに10分くらいで実装しました。

Stream.continually(util.Random.nextPrintableChar) take(140) mkString

scala> "1234567789".map( x => x )        
res0: String = 1234567789

scala> "1234567789".map( x => Option(x) )          
res1: scala.collection.immutable.IndexedSeq[Option[Char]] = Vector(Some(1), Some(2), Some(3), Some(4), Some(5), Some(6), Some(7), Some(7), Some(8), Some(9))

"1234567890".reverse.sliding(3,3).map( x => x.reverse).toList.reverse.mkString(",");

scala>  def date(year:Int, month:Int, day:Int) = "%s/%02d/%02d" format(year, month, day)
date: (year: Int,month: Int,day: Int)String

scala> date(2011, 07, 18)                                                               
res22: String = 2011/07/18

scala> def date(month:Int=10, day:Int) = "%s/%s" format (month, day)
date: (month: Int,day: Int)String

scala> date(30)
<console>:7: error: not enough arguments for method date: (month: Int,day: Int)String.

scala> def log(msg:String, length:Int = msg.length) = "[%s] %s" format(length, msg)
<console>:5: error: not found: value msg
       def log(msg:String, length:Int = msg.length) = "[%s] %s" format(length, msg)
                                        ^

scala> def now(time:java.util.Date = new java.util.Date) = time.toString
now: (time: java.util.Date)java.lang.String

scala> now
<console>:7: error: missing arguments for method now in object $iw;