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Junichi Kato j5ik2o

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j5ik2o / MyOption.scala
Last active May 18, 2017 15:14
package example
/**
* 値が存在する・しないの両状態を表す型を表すトレイト。
*
* @tparam A 値の型
*/
sealed trait MyOption[+A] {
/**
@j5ik2o
j5ik2o / LoarnMain.scala
Last active May 8, 2017 02:14
import java.io._
import java.nio.charset.StandardCharsets
object LoarnMain extends App {
def getFileBody(file: String): String =
using(new FileInputStream(file)) { fis =>
val text = new Array[Byte](fis.available)
fis.read(text)
new String(text, StandardCharsets.UTF_8)
@j5ik2o
j5ik2o / .scalafmt.conf
Last active August 9, 2018 08:39
style = defaultWithAlign # For pretty alignment.
maxColumn = 100 # For my wide 30" display.
includeCurlyBraceInSelectChains = false
newlines.penalizeSingleSelectMultiArgList = false
project.git = true
project.excludeFilters = ["target/"]
@j5ik2o
j5ik2o / Function0.scala
Last active April 30, 2017 05:30
scala> val getTimeString = new Function0[String] {
| override def apply: String = ZonedDateTime.now.toString
| }
getTimeString: () => String = <function0>
scala> :javap getTimeString
Size 902 bytes
MD5 checksum dc6b8c20b0a3937afbe114e129c22cb9
Compiled from "<console>"
public class $line4.$read$$iw$$iw$$iw$$iw$
@j5ik2o
j5ik2o / list.md
Last active March 26, 2017 15:08 
    ├── cargo
    │   ├── Cargo.java
    │   ├── CargoRepository.java
    │   ├── Delivery.java
    │   ├── HandlingActivity.java
    │   ├── Itinerary.java
    │   ├── Leg.java
    │   ├── RouteSpecification.java
    │   ├── RoutingStatus.java
@j5ik2o
j5ik2o / BankAccount.java
Last active March 11, 2017 18:20
class BankAccount {
public void setName(String name) {
this.name = name;
}
public void setCustomerId(long customerId) {
this.customerId = customerId
}
@j5ik2o
j5ik2o / ChatRoom.scala
Last active March 17, 2017 00:02
case class Administrators(userId: Long, userIds: Seq[Long])
case class Member(userId: Long, byAdministratorId: Option[Long] = None)
case class Memebers(userIds: Seq[Member])
case class Message(id: Long, value: String, senderId: Long)
case class Messages(values: Seq[Message])
@j5ik2o
j5ik2o / UseBackoff.scala
Last active March 10, 2017 23:59
val childProps = Props(classOf[EchoActor])
val stopBackOffOptions = Backoff.onStop(childProps, "c1", 100.millis, 3.seconds, 0.2)
val failureBackOffOptions = Backoff.onFailure(childProps, "c1", 100.millis, 3.seconds, 0.2)
val stopBackOffSupervisor = system.actorOf(BackoffSupervisor.props(stopBackOffOptions))
val failureBackOffSupervisor = system.actorOf(BackoffSupervisor.props(failureBackOffOptions))
@j5ik2o
j5ik2o / hasManyThrough.scala
Created March 3, 2017 01:46
case class Item(
id: Option[Long],
code: String,
name: String,
url: String,
imageUrl: String,
price: Int,
createAt: DateTime,
updateAt: DateTime,
users: Seq[User] = Seq.empty
@j5ik2o
j5ik2o / for.scala
Last active February 22, 2017 13:03
case class User(id: Long, name: Option[String])
object UserDao {
def findById(id: Long): Option[User] = {
if (id % 3 == 0)
Some(User(id, Some("Kaneko")))
else if (id % 5 == 0)
Some(User(id, None))
else