David Vrba

David Vrba has asked 0 questions and find answers to 19 problems.

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About

I work as a Senior ML Engineer at Socialbakers. Besides that, I am also Apache Spark trainer and consultant. I lecture Spark trainings, workshops and on regular basis, I also give public talks related to Spark and publish articles on Medium.

David Vrba questions

David Vrba answers

How to dynamically slice an Array column in Spark?
Spark Window aggregation vs. Group By/Join performance
Error using spark 'save' does not support bucketing right now
Speed up InMemoryFileIndex for Spark SQL job with large number of input files
How to count the trailing zeroes in an array column in a PySpark dataframe without a UDF
How to check if a Spark data frame struct Array contains a specific value
Spark: UDF executed many times