scala

How do I import classes from one or more local .jar files into a Spark/Scala Notebook?

由 隐身守侯 提交于 2021-01-01 08:13:35
问题 I am struggling to load classes from JARs into my Scala-Spark kernel Jupyter notebook. I have jars at this location: /home/hadoop/src/main/scala/com/linkedin/relevance/isolationforest/ with contents listed as follows: -rwx------ 1 hadoop hadoop 7170 Sep 11 20:54 BaggedPoint.scala -rw-rw-r-- 1 hadoop hadoop 186719 Sep 11 21:36 isolation-forest_2.3.0_2.11-1.0.1.jar -rw-rw-r-- 1 hadoop hadoop 1482 Sep 11 21:36 isolation-forest_2.3.0_2.11-1.0.1-javadoc.jar -rw-rw-r-- 1 hadoop hadoop 20252 Sep 11

How do I import classes from one or more local .jar files into a Spark/Scala Notebook?

由 独自空忆成欢 提交于 2021-01-01 08:12:06
问题 I am struggling to load classes from JARs into my Scala-Spark kernel Jupyter notebook. I have jars at this location: /home/hadoop/src/main/scala/com/linkedin/relevance/isolationforest/ with contents listed as follows: -rwx------ 1 hadoop hadoop 7170 Sep 11 20:54 BaggedPoint.scala -rw-rw-r-- 1 hadoop hadoop 186719 Sep 11 21:36 isolation-forest_2.3.0_2.11-1.0.1.jar -rw-rw-r-- 1 hadoop hadoop 1482 Sep 11 21:36 isolation-forest_2.3.0_2.11-1.0.1-javadoc.jar -rw-rw-r-- 1 hadoop hadoop 20252 Sep 11

Pattern matching against type-member with Aux-pattern

由 心已入冬 提交于 2020-12-31 06:09:25
问题 Consider: sealed trait A case object B extends A case object C extends A case object D extends A sealed trait Test { type AA <: A val aa: AA } object Test { type Aux[AAA <: A] = Test { type AA = AAA } } def compilesOk(t: Test) = t.aa match { case _: B.type => println("B") case _: C.type => println("C") case _: D.type => println("D") } def compileError(t: Test) = t.aa match { case B => println("B") case C => println("C") case D => println("D") } The compileError function fails to compile with

Pattern matching against type-member with Aux-pattern

由 丶灬走出姿态 提交于 2020-12-31 06:05:27
问题 Consider: sealed trait A case object B extends A case object C extends A case object D extends A sealed trait Test { type AA <: A val aa: AA } object Test { type Aux[AAA <: A] = Test { type AA = AAA } } def compilesOk(t: Test) = t.aa match { case _: B.type => println("B") case _: C.type => println("C") case _: D.type => println("D") } def compileError(t: Test) = t.aa match { case B => println("B") case C => println("C") case D => println("D") } The compileError function fails to compile with

Pattern matching against type-member with Aux-pattern

由 泄露秘密 提交于 2020-12-31 06:04:59
问题 Consider: sealed trait A case object B extends A case object C extends A case object D extends A sealed trait Test { type AA <: A val aa: AA } object Test { type Aux[AAA <: A] = Test { type AA = AAA } } def compilesOk(t: Test) = t.aa match { case _: B.type => println("B") case _: C.type => println("C") case _: D.type => println("D") } def compileError(t: Test) = t.aa match { case B => println("B") case C => println("C") case D => println("D") } The compileError function fails to compile with

Java核心技术 卷II 高级特性 原书第9版pdf

由 拈花ヽ惹草 提交于 2020-12-31 04:36:01
下载地址： 网盘下载 内容简介 · · · · · · Java领域最有影响力和价值的著作之一，由拥有20多年教学与研究经验的资深Java技术专家撰写（获Jolt大奖），与《Java编程思想》齐名，10余年全球畅销不衰，广受好评。第9版根据Java SE 7全面更新，同时修正了第8版中的不足，系统全面讲解Java语言的核心概念、语法、重要特性和开发方法。本书全面覆盖Java技术的高级主题，包括流与文件、XML、网络、数据库编程、国际化等，详细描述了图形与GUI编程，还涉及安全、远程方法、注解处理、本地方法等。本书对Java技术的阐述精确到位，叙述方式深入浅出，并包含大量示例代码，能够帮助读者充分理解Java语言并灵活应用。 作者简介 · · · · · · Cay S。 Horstmann，圣何塞州立大学计算机科学系教授、Java的倡导者，经常在开发人员会议上发表演讲。他是《Scala for the Impatient》（Addison-Wesley， 2012）的作者，并参与撰写了《Core JavaServerTM Faces，Third Edition》（Prentice Hall， 2010）。 Gary Cornell，已经教授程序设计专业课程20余年，并撰写了多部专著。他是Apress的创始人之一。他撰写的程序设计专业书籍十分畅销，曾荣获Jolt大奖

Spark Structured Streaming Multiple WriteStreams to Same Sink

由 岁酱吖の 提交于 2020-12-29 13:55:40
问题 Two Writestream to the same database sink is not happening in sequence in Spark Structured Streaming 2.2.1. Please suggest how to make them execute in sequence. val deleteSink = ds1.writestream .outputMode("update") .foreach(mydbsink) .start() val UpsertSink = ds2.writestream .outputMode("update") .foreach(mydbsink) .start() deleteSink.awaitTermination() UpsertSink.awaitTermination() Using the above code, deleteSink is executed after UpsertSink . 回答1: If you want to have two streams running

Recovering underlying Future into Cats' EitherT's Left?

由 家住魔仙堡 提交于 2020-12-29 12:33:48
问题 If I have a Future[Either[String, Int]] that represents either a possible error message ( String ) or a successful computation ( Int ), it is simple to move the Future 's potential failure into the left side as an error message: def handleFailure(fe: Future[Either[String,Int]]) = f.recover({ case e: Exception => Left(s"failed because ${e.getMessage}")) I would expect something similar to exist for EitherT , but maybe I just can't find out what it is called. It is relatively simple, but

Recovering underlying Future into Cats' EitherT's Left?

由 独自空忆成欢 提交于 2020-12-29 12:33:46
问题 If I have a Future[Either[String, Int]] that represents either a possible error message ( String ) or a successful computation ( Int ), it is simple to move the Future 's potential failure into the left side as an error message: def handleFailure(fe: Future[Either[String,Int]]) = f.recover({ case e: Exception => Left(s"failed because ${e.getMessage}")) I would expect something similar to exist for EitherT , but maybe I just can't find out what it is called. It is relatively simple, but

Wrap function implementations returning a specific type into another function programatically

由 北战南征 提交于 2020-12-29 08:19:07
问题 I would like to wrap all the user defined functions in a scala project that return a certain type T , into a function that accepts a T and the function name as parameters. eg. given this function is in scope: def withMetrics[T](functionName: String)(f: => Try[T]): Try[T] = { f match { case _: Success[T] => println(s"send metric: success for $functionName") case _: Failure[T] => println(s"send metric: failure for $functionName") } f } the user can send metrics for their functions which return
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