Raphael Roth

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Raphael Roth has asked 85 questions and find answers to 111 problems.

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Raphael Roth questions

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
JNA with Fortran assumed size array
import implicit conversions without instance of SparkSession
concise way to filter and map a scala sequence of tuples containing options
Strange behavior in a code to test a thread-safe singleton

Raphael Roth answers

Spark Get only columns that have one or more null values
How to add dependency to maven project? (How to find out GroupID / ArtifactID from external jar file) [duplicate]
spark dataframe save as partitioned table very slowly
Create boolean flag based on column value containing element of a List [duplicate]
writing 2 data frames in parallel in scala
How can I iterate Spark's DataFrame rows?
Plot subplots from a very large file in gnuplot
Plotting a map : arrows disappear
How to make plots larger in GnuPlot
Spark Join of 2 dataframes which have 2 different column names in list