scala-2.12

问题 While running the following spark mllib on local mode with scala 2.12.3 , encountered the following error lambda not serialazable Any inputs would be much appreciated ? (Moving onto scala 2.11 is not an option for me) Can you please let me know what can i do to avoid this issue? Thankyou import java.io.FileWriter import org.apache.spark.SparkConf import org.apache.spark.ml.Pipeline import org.apache.spark.ml.evaluation.RegressionEvaluator import org.apache.spark.ml.feature.StringIndexer

问题 While running the following spark mllib on local mode with scala 2.12.3 , encountered the following error lambda not serialazable Any inputs would be much appreciated ? (Moving onto scala 2.11 is not an option for me) Can you please let me know what can i do to avoid this issue? Thankyou import java.io.FileWriter import org.apache.spark.SparkConf import org.apache.spark.ml.Pipeline import org.apache.spark.ml.evaluation.RegressionEvaluator import org.apache.spark.ml.feature.StringIndexer

问题 While running the following spark mllib on local mode with scala 2.12.3 , encountered the following error lambda not serialazable Any inputs would be much appreciated ? (Moving onto scala 2.11 is not an option for me) Can you please let me know what can i do to avoid this issue? Thankyou import java.io.FileWriter import org.apache.spark.SparkConf import org.apache.spark.ml.Pipeline import org.apache.spark.ml.evaluation.RegressionEvaluator import org.apache.spark.ml.feature.StringIndexer

问题 While running the following spark mllib on local mode with scala 2.12.3 , encountered the following error lambda not serialazable Any inputs would be much appreciated ? (Moving onto scala 2.11 is not an option for me) Can you please let me know what can i do to avoid this issue? Thankyou import java.io.FileWriter import org.apache.spark.SparkConf import org.apache.spark.ml.Pipeline import org.apache.spark.ml.evaluation.RegressionEvaluator import org.apache.spark.ml.feature.StringIndexer

问题 After installing JDK9, I get this exception when running my Scala projects. Upgrading Scala to 2.12.2 also didn't resolve my problem. 回答1: The java.xml.bind module is not resolved by default when running code on the module path. This means that if you depend on JAXB then you need to run with --add-modules java.xml.bind or else deploy JAXB on the class path (or module path). Update: The "Modules Shared with Java EE Not Resolved by Default" section of JDK 9 Migration Guide provides more

问题 In my sbt project in Scala 2.12 I am using IntelliJ IDEA and want to import scalatest. In order to install the recommended SuperSafe Community Edition Scala compiler plugin . I followed the instruction here. My plugin.sbt : addSbtPlugin("com.artima.supersafe" % "sbtplugin" % "1.1.2") the error showed by the Intellij import is: SBT project import [warn] [FAILED ] com.artima.supersafe#sbtplugin;1.1.2!sbtplugin.jar(src): (0ms) [warn] ==== typesafe-ivy-releases: tried [warn] https://repo.typesafe

问题 The bounty expires in 2 days . Answers to this question are eligible for a +100 reputation bounty. tribbloid wants to draw more attention to this question. I'm seeking a method to create a serializable TypeTag without using compile time tools (completely relying on runtime). This is a basic feature for all reflective language. The answer in this post proposed a few methods: In Scala, how to create a TypeTag from a type that is serializable? NONE OF THEM WORKED: package com.tribbloids.spike

问题 I'm trying to writing a generic max method for Scala Enumeration values. I have def enumMax[E <: Enumeration, V <: E#Value](v1: V, v2: V): V = v1.compare(v2) match { case x if x > 0 => v1 case x if x < 0 => v2 case _ => v1 } but I'm getting the rather cryptic error message [error] overloaded method value compare with alternatives: [error] ((that: _1.Value)Int) forSome { val _1: E } <and> [error] (that: _1.Value)Int [error] cannot be applied to (V) [error] def enumMax[E <: Enumeration, V <: E

问题 Hex literal containing A-F digit are converting to int by default. When I am trying to declear an Int with 0x it is creating correctly. val a: Int = 0x34 val b: Int = 0xFF But when I am trying to declear a Byte with 0x second line is not compiling val a: Byte = 0x34 val b: Byte = 0xFF // compilation error I have found a workaround that is val a: Byte = 0x34 val b: Byte = 0xFF.toByte But is there any decent way to declear a Byte from its hex literal? For example I am trying to declear a Byte

问题 This code that works in Scala 2.11 doesn't work in 2.12: import scala.reflect.runtime.universe import scala.tools.reflect.ToolBox val tb = universe.runtimeMirror(getClass.getClassLoader).mkToolBox() tb.eval(tb.parse("""println("hello!")""")) I get the error below, what changed in 2.12? Exception in thread "main" java.lang.AbstractMethodError: scala.reflect.internal.SymbolPairs$Cursor.matches(Lscala/reflect/internal/Symbols$Symbol;)Z Note: I had to add to the classpath scala-compiler-2.12.2