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My Personal Report of Scala Kansai 2016
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Pishen Tsai
November 01, 2016
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My Personal Report of Scala Kansai 2016
Pishen Tsai
November 01, 2016
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Transcript
Pishen(屁軒) 的 Scala関西 之旅
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10:00 18:30 4F,6F 本編 無料 +懇親会 4500円
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The IT meetup platform for building connections.
Searched "Scala" gave out 360 events...
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4Fイベントホール 6F 会議室AB 6F 会議室D (ハンズオン)
The セッションs 不是內容太難看不懂,就是日文太難聽不懂
• Scala入門/基礎的な文法 - 5場 • 開発環境・ビルドツール - 1場 • Webアプリケーションフレームワーク
- 2場 • 関数型プログラミング - 2場 • 業務への導入・活用事例 - 5場 • データサイエンス - 2場 • Scala.js - 0場 (去年有) • リアクティブシステム - 5場 • コンパイラ・JVM - 1場
#1 http://www.slideshare.net/TaisukeOe/real-world-android-akka
#1 麻植 泰輔 Taisuke Oe - BONX Inc. - ScalaMatsuri
總召 - 業餘 Scala 教師 - DL4J 成員
#1
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#1 • sbt-android • Macroid • Proguard • Jack &
Jill
#2
#2 竹添 直樹 Naoki Takezoe - BizReach - GitBucket -
ScalaWarrior - Scala逆引きレシピ
#2
#2
#2 https://github.com/scalawarrior/scalawarrior
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#4 岡田 遥来 Haruki Okada - Opt Inc. - chronoscala
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#4 opt-tech/chronoscala A port of nscala_time to JSR-310 https://github.com/opt-tech/chronoscala
#4
ZonedDateTime.now() + 2.months ZonedDateTime.now() < ZonedDateTime.now() + 1.month ZonedDateTime.now() to
(ZonedDateTime.now() + 1.day) (ZonedDateTime.now() to (ZonedDateTime.now() + 1.second)).millis 2.hours + 45.minutes + 10.seconds // returns PT2H45M10S (2.hours + 45.minutes + 10.seconds).millis 2.months + 3.days // returns P2M3D LocalDate.now() to (LocalDate.now() + 7.days) by 2.days #4
#4
お昼休憩 (60分)
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#5 中村 学(がくぞ) @gakuzzzz - Tech to Value 株式会社 -
ScalaMatsuri 營運成員
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#6 前出 祐吾 & 杉本 貴史 - TIS 株式会社
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#7 Naoki Aoyama @aoiroaoino - Monocle's committer
#7 case class B(b: Int) case class A(a: Int, b:
B) val a1 = A(1, B(2)) val a2 = a1.copy(a = 10) val a3 = a1.copy(b = a1.b.copy(b = 20))
#7 a.copy( b = a.b.copy( c = a.b.c.copy( d =
a.b.c.d.copy( e = a.b.c.d.e.copy( f = 87 ) ) ) ) ) The copy method hell.
#7 Lens = getter + setter
#7 getter def get[S, A]: S => A
#7 setter def set[S, A]: S => A => S
class Lens[S, A]( getter: S => A, setter: S =>
A => S ) { def get(s: S) = getter(s) def set(s: S, a: A) = setter(s)(a) def modify(s: S, f: A => A) = set(s, f(get(s))) } #7
case class User(id: Int, name: String) val _id = new
Lens[User, Int]( _.id, user => newId => user.copy(id = newId) ) val u1 = User(100, "Pishen") val u2 = _id.set(u1, 101) #7
class Lens[S, A](getter: S => A, setter: S => A
=> S) { def get(s: S) = getter(s) def set(s: S, a: A) = setter(s)(a) def modify(s: S, f: A => A) = set(s, f(get(s))) def ^|->[B](other: Lens[A, B]): Lens[S, B] = new Lens( s => other.get(this.get(s)), s => b => this.set(s, other.set(this.get(s), b)) ) } #7
#7 case class Msg(user: User, body: String) val msg =
Msg(User(100,"Pishen"), "Hi") msg.copy( user = msg.user.copy( id = 101 ) ) (_user ^|-> _id).set(msg, 101)
#7 What if getter return an Option? => Prism
#7 https://github.com/julien-truffaut/Monocle
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Sessions が終わった
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懇親会だ!!
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心得: • 隨便 commit 個小東西就可以拿來當作 搭訕的好藉口。 • 我們需要更多面向初心者的活動/教材?
末尾再帰!