ScalaFukuoka 2017 Backlog.key

Size: px

Start display at page:

Download "ScalaFukuoka 2017 Backlog.key"

かずまさひがき
5 years ago
Views:

53 [T] <T> => -> Option Optional val & var let & var for

54 implicit class Foo(val a: String) { def foo: Int = 3 * a.toint } 9.foo extension String { var foo: Int { return 3 * Int(self)! } } 9.foo struct Foo { Foo(const char* a) : a(a) {} int foo() { return 3 * atoi(a); } private: const char* a; }; Foo a = 33"; a.foo();

55 for 文ムズカシイネ for comprehension for loop for { i <- 1 until n j <- 1 until i if isprime(i + j) } yield (i, j)

56 The Scala Language Specification Version 2.9 / 6.19 For Comprehensions and For Loops for(p <- e) yield e e.map{case p => e } p <- e if g p <- e.withfilter((x1,,xn) => g) for(p <- e; p <- e ; ) yield e e.flatmap{ case p => for(p <- e ; ) yield e }

57 for { i <- 1 until n j <- 1 until i if isprime(i + j) } yield (i, j) for(p <- e; p <- e ; ) yield e e.flatmap{ case p => for(p <- e ; ) yield e } (1 until n).flatmap { case i => for (j <- 1 until i if isprime(i + j)) yield (i, j) }

58 (1 until n).flatmap { case i => for (j <- 1 until i if isprime(i + j)) yield (i, j) } p <- e if g p <- e.withfilter((x1,,xn) => g) (1 until n).flatmap { case i => for (j <- (1 until i).withfilter { j => isprime(i + j) } ) yield (i, j) }

59 (1 until n).flatmap { case i => for (j <- (1 until i).withfilter { j => isprime(i + j) } ) yield (i, j) } for(p <- e) yield e e.map{case p => e } (1 until n).flatmap { case i => (1 until i).withfilter { j => isprime(i + j) }.map { case j => (i, j) } }

60 for { i <- 1 until n j <- 1 until i if isprime(i + j) } yield (i, j) (1 until n).flatmap { case i => (1 until i).withfilter { j => isprime(i + j) }.map { case j => (i, j) } }

61 The Scala Language Specification Version 2.9 / 6.19 For Comprehensions and For Loops for(p <- e) yield e e.map{case p => e } p <- e if g p <- e.withfilter((x1,,xn) => g) for(p <- e; p <- e ; ) yield e e.flatmap{ case p => for(p <- e ; ) yield e }

62 flatmap map withfilter for { : allprojects <- projectrepository.allrelatedprojectsorderrecent(ctx.user.id) usercount <- userrepository.countusersofspace(ctx.space.id) allprojectids = allprojects.map(_.id) mypullrequests <- pullrequestrepository.allmyrequest(user.id, allprojectids) activities <- projectactivityrepository.allgroupedactivitiesofspace (allprojectids, activitytypes, pagination) : } yield DashboardContents( : allprojects = allprojects, usercount = usercount, mypullrequests = mypullrequests, activities = activities, : ) }

64 使っている言語やライブラリ新現在言語 Scala Java ウェブフレームワーク Play Webwork テンプレートエンジン Twirl Velocity スクリプト Haxe Haxe

65 Play API Core

66 Java Scala

67 Play API Core

68 xwork-dashboard.xml <!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN" " <xwork> <package name="dashboard" extends="default"> <default-interceptor-ref name= defaultauthcomponentstack"/> <action name="dashboard" class="jp.co.nulab.backlog.webwork.dashboard.dashboard"> <result name="success" type="velocity"> <param name="location">/pages/dashboard/dashboard.vm</param> </result> </action> </package> </xwork> routes GET /dashboard controllers.dashboard.dashboardcontroller.viewdashboard()

69 for if map filter def viewdashboard() = addtoken { actions.useraction.async { implicit request => dashboardapplicationservice.viewdashboard().map { contents => Ok(views.html.dashboard.dashboard(contents)) } } }

70 Velocity ${action.gettext( msg.dashboard.storage.warning', $!webwork.htmlencode($action.diskusageratio))} msg.dashboard.storage.warning", contents.diskusageratio))

71 Velocity #parse("/pages/_newui/common/parts/globalheader.vm")

72 Play API Core

73 def viewdashboard()(implicit ctx: UserContext): Future[DashboardContents] = { for { contents <- dashboardcontentsfactory.create() } yield contents }

74 def create()(implicit ctx: UserContext, io: IOContext, ec: ExecutionContext): Future[DashboardContents] = { val user = ctx.user val activitytypes = ActivityType.availableActivities(user.role) val pagination = PaginationQuery(count = 10) } for { : allprojects <- projectrepository.allrelatedprojectsorderrecent(ctx.user.id) usercount <- userrepository.countusersofspace(ctx.space.id) : } yield DashboardContents( : allprojects = allprojects, usercount = usercount, : )

76 Scala Java

untitled

untitled Struts IT Open Source JavaEE Application Consulting Struts Open Source JavaWorld Jakarta 4 Jakarta/Apache Copyright(c) yukimitsu kurozumi 2007 All Rights Reserved. 2 1986 150 CAC OSS Consulting,, Web System