I am using getting the below line of error : My Pom : Any help regarding this ? Answer Check mvn dependency:tree. All your Scala libs will be suffixed with the major Scala version: All of them need to be the same major version otherwise you’ll get binary incompatible libs at runtime. Your maven pom shou…
Tag: scala
A parquet file of a dataset having a String field containing leading zeroes returns that field without leading zeroes, if it is paritionned by it
I have a Dataset gathering informations about French cities, and the field that is troubling me is the department one (CodeDepartement). When the Dataset isn’t partitioned by this String field codeDepartement: everything is working well When that function runs, if I don’t attempt to partition the …
Java cannot find symbol for imported scala class
I received a Scala jar and need to write a java program to use a method. The imported Scala method definitely works because it has been in production for years. here is the program: Decompiled Scala code: Here are observations: Error message: cannot find symbol constructor VerifyApp() location: class com.comp…
Why should I use jdk1.8.0 instead of jdk-17?
I am studying Scala, with IntelliJ IDEA. Project SDK was always jdk-17, everything was OK, until now. I began practicing in actors (Akka in action using Scala). Problems (like scalac: Error: Error compiling the sbt component ‘compiler-interface-2.11.8-61.0’) started compiling book examples. The ad…
Unable to connect to a database using JDBC within Spark with Scala
I’m trying to read data from JDBC in Spark Scala. Below is the code written in Databricks. I’m getting the following error message: Could someone please let me know how to resolve this issue. Answer The certificate used by your host is not trusted by java. Solution 1 (Easy, not recommended) Disabled certifica…
How to change keys from a map in scala
How to change the following keys from the map without any variables full functional to I tried with map and was able to change the keys to the same strings but not to different ones. Answer You can apply a map to all the items but focus only on the keys: You can define f to be a function or
CORS issue / akka-http-cors / No ‘Access-Control-Allow-Origin’ header is present on the requested resource in Scala/Java
How do I implement akka-http-cors correctly to be able to allow access from any origin (domain, in my case localhost:3000) to a Https Server (Scala/Akka)? Based on the akka-http-cors documentation should defaultSettings do the job, but I am still doing something wrong: Google Chrome Error: Firefox Error: akka…
How to use Array Spilling with Apache POI 5.1.0
Using Apache POI to generate excel files, is it possible to prevent Excel from adding the implicit intersection operator (@) inside formulas ? For instance, using the following code, what I want to do is copy all the values inside the columns from A to K, using Excel Array Spilling behaviour. However, when op…
Symbol ‘type scala.package.Serializable’ is missing from the classpath
my classpath is missing serializable and cloneable classes.. i am not sure how to fix this. i have a sbt application which looks like this when i do a sbt build i am getting.. my dependency tree only shows jars, but this seems to be a class/package conflict or missing.. Answer You’re using an incompatib…
Accessing GRIB data using GRIB2Tools causes IndexOutOfBoundException
I’m manipulating GRIB2 forecast files and I’m having trouble using the GRIB2Tools library. I have an Array[Byte] representing the content of a GRIB2 dataset. Because I want to be able to get value at specific location, I wrote this variable’s content to a file which I’m then loading as…