Raphael Roth

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Raphael Roth has asked 92 questions and find answers to 125 problems.

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Raphael Roth questions

Java convert UTC / CET time
Get executable name during runtime
Implicit conversion integer <--> logical in Fortran if statement
Invoke sed only on files which contain a certain string - problems with whitespaces in filenames
Unable to write method in Scala working both for Double and Float
Spark custom aggregation : collect_list+UDF vs UDAF
Cache not preventing multiple filescans?
What is the goal of the java.nio.file.CopyOption interface?
How to get the name of a Spark Column as String?
Plotly plot single trace with 2 yaxis

Raphael Roth answers

Lookup in Spark dataframes
How to see the type of a scala variable? For instance a Spark PairRDD
spark dataframe groupping does not count nulls
Scala Spark use Window function to find max value
Spark distribute tasks over several executors
How can I parallelize multiple Datasets in Spark?
Grab last different data on Spark Dataframe?
Unsupported literal type class scala.collection.immutable.HashSet$HashTrieSet
Discarding first few values while calculating moving average using Spark window function
Spark udf with non column parameters