Questions tagged [scala-2.12]
Version 2.12 of the Scala programming language.
scala-2.12
76
questions
0
votes
0
answers
55
views
Scala 2.13 migration from 2.12 bring Conflicting cross-version suffixes in: org.scala-lang.modules:scala-parser-combinators
While I am trying to migrate scala project from 2.12 to 2.13 , I am getting the below error with following stracktrace
java.lang.RuntimeException: Conflicting cross-version suffixes in: org.scala-...
- 1
0
votes
0
answers
28
views
Spark2 to Spark3 Upgrade -> DataFrame foreachPartition method does not work
This code works in Spark 2.4 with Scala 2.11.7. It is not working in Spark 3.4.2 with Scala 2.12.15.
I have tried Running change the foreachPartition(parti => { })
to
.foreachPartition((parti: ...
- 71
0
votes
0
answers
32
views
Is there a way to instantiate an object from a generic in Scala 2?
Sorry for silly question in advance. I use Scala 2.12.15 and the design of the project implies the use of traits to add some logic to classes. I have class Printer and going to extend it with ...
- 1
0
votes
1
answer
103
views
Error importing Spark version 2.12.10 in Scala project Intellij IDE
I am trying to run Scala Spark code in IntelliJ IDE.
I have created the following build.sbt file in my project root directory:
name := "SimpleProject"
version := "0.1"
...
- 817
1
vote
1
answer
88
views
Jooq for scala, how to create Converter for Option[Long]
I guess there is some issue with scala Long and java primitive long
class JooqOptionalLongConverter extends Converter[Long, Option[Long]] {
override def from(databaseObject: Long): Option[Long] =
...
- 3,709
2
votes
1
answer
76
views
How to bulk connect IO bundles in chisel? How does BiConnect work?
I struggle to understand the documentation around the <> operator in chisel but I have managed to something like this successfully, so I thought I had some understanding of it:
fetchStage....
- 67
0
votes
0
answers
92
views
More efficient groupBy scala, avoid GC overhead limit exceeded
This question is unrelated to Spark, and I'm working on scala 2.12 so I don't have access to groupMap or groupMapReduce.
I currently have code like the following
val customerTrips = customerData....
- 616
0
votes
1
answer
124
views
Parametric polymorphism issue with spark implicits, value toDF is not a member of Seq[T]
This is on scala 2.12.10 and spark 2.4.8. I am trying to define a trait as follows with a method that can convert an array of some case class to be converted to a dataframe. The type parameter is ...
- 616
0
votes
1
answer
149
views
main method not executed with App in Scala
Hi I'm new to scala and trying to use scala 2.12.10 for a project. I'm trying to follow along with this tutorial which is written for the latest version of scala and I've gotten it to work fine (the ...
- 616
0
votes
1
answer
67
views
Dependent type constraints (?) on trait in Scala
I have the following model:
sealed trait MyRequest {
type Response <: MyResponse
}
sealed trait MyResponse {
type Request <: MyRequest
}
case class SayHelloRequest(name: String) extends ...
- 1,029
0
votes
1
answer
121
views
Return singleton/object from method
How can I make this work?
def getSingleton[T <: scala.Singleton]: T = {
???
}
object X
val x = getSingleton[X.type]
Or similar, appreciate the signature may need to change slightly.
- 1,029
0
votes
3
answers
104
views
Scala: Sorting a list while keeping the position of placeholders
The problem I'm facing is sorting a List of Double values in Scala also containing some kind of placeholder values (Double.NaN in the example below. However, these can be set as required for the ...
- 25
0
votes
0
answers
80
views
scala migration backward compatibility issue
I am facing serialisation issue when trying to read the binary object file which is stored using scala 2.11.11 with scala 2.12.17.
We're migrating our MLpipeline from Spark 2.4(scala 2.11.11) &to ...
- 11
0
votes
2
answers
111
views
(Scala 2.12.8) pattern type is incompatible with expected type for parameterized type inside of parameterized class
(Scala 2.12.8)
Full Example
So lets say you have some "TypeEvidence" for some specific concrete types:
sealed trait TypeEvidence[+T]
object TypeEvidence{
case object DoubleType extends ...
0
votes
1
answer
378
views
In Scala, define a generic tuple type with variable length and multiple types
How can I define a generic tuple type that can
have variable length
contain different types
?
In the below example, I would need to define the return type of foo in trait A to match the ...
- 66