vvg questions

vvg answers

• Efficient way to transform several columns to string in PySpark
• Scala case class with cached hashCode
• Package does not exist error when package was added to classpath
• Locking by value
• Compare a pyspark dataframe to another dataframe
• sbt-scoverage exclude syntax
• How to change number of executors in local mode?
• When is it appropriate to use a TrieMap?
• Why does Scala Try not catching java.lang.StackOverflowError?
• Scala return boolean with if else