Tim questions

Tim answers

• Scala - map function - Only returned last element of a Map
• What is the difference between SPARK Partitions and Worker Cores?
• How to read gz compressed file by pyspark
• Spark Scala Serialization Error from RDD map
• spark: SAXParseException while writing to parquet on s3
• How to calculate the best numberOfPartitions for coalesce?
• json4s Serialize and deserialize generic type
• Is foldRight equivalent to foldLeft given a noncommutative associative operation?
• Spark Local Mode - all jobs only use one CPU core
• scala.MatchError: [Ljava.lang.String; (of class [Ljava.lang.String;)