maiha

# create database 'foo'
% mysqladmin -u root create foo

# give full privileges to user 'maiha'
% mysql -u root
mysql> grant all on foo.* to maiha;

# reload role tables
% mysqladmin -u root reload

maiha

// http://www.playframework.org/documentation/1.1-trunk/firstapp

package controllers

import play.mvc._
import play.data.validation._           // @Required

object Hello extends Controller {
  def index = render()

maiha

  def login_required(email: String, password: String) {
    User.find("byEmail", email).first match {
      case u:User if u.password == password =>
        session.put("user", u.email)
        Application.index
      case u:User => render("reminder", u.email)
      case _ => access_denied
    }
  }

maiha

object Hello extends Controller {
  def index {
    val user_count = User.count
    render(user_count)
  }
}

maiha

package controllers

import play.mvc._

case class Item(name: String)

object Sig extends Controller {

  // OK "/sig/index1?name=foo" => name is "foo" (@render)
  def index1(name: String) = stub_item match {

maiha

import cassandra._

val storage = Storage()
// => storage: cassandra.Storage = cassandra.Storage@cabe02e

storage("key")          // => ""
storage("key") = "aho"  // Unit
storage("key")          // => "aho"

storage("key:field")             // => ""

maiha

def bench(code: => Any, times: Int = 1) {
  val start = System.nanoTime
  for(_ <- 1 to times) code
  println(format("%.4f", (System.nanoTime - start)/1000000000.0))
}

scala> bench( 1+1 )
0.0000

scala> bench( 1+1, 10000)

maiha

[OK]
  def sum(a:Int,b:Int) = a+b

[NG]
  def sum(a:Int,b:Int) = a+b
  def sum(a:Int,b:String) = sum(a, b.toInt)

// (compile error)
//  overloaded method sum needs result type
//     def sum(a:Int,b:String) = sum(a, b.toInt)

maiha

    <Keyspace Name="Test">
      <ColumnFamily Name="Aho1" />
      <ColumnFamily Name="Aho2" />
 <ReplicaPlacementStrategy>org.apache.cassandra.locator.RackUnawareStrategy</ReplicaPlacementStrategy>
      <ReplicationFactor>1</ReplicationFactor>
<EndPointSnitch>org.apache.cassandra.locator.EndPointSnitch</EndPointSnitch>
    </Keyspace>

      <ReplicaPlacementStrategy>org.apache.cassandra.locator.RackUnawareStrategy</ReplicaPlacementStrat\
egy>

maiha

object ascii {
  def a: PartialFunction[String, Int] = { case "a" => 97 }
  def b: PartialFunction[String, Int] = { case "b" => 98 }
  def ab = a orElse b
}

ascii.a("a") => 97
ascii.a("b") // scala.MatchError: b
ascii.ab("a") => 97
ascii.ab("b") => 98