Yuan JI questions

Yuan JI answers

• Naive Bayes in Spark MLlib
• Spark SQL - JAVA syntax of CASE-THEN?
• ~ Binary Ones Complement in Python 3
• Spark (JAVA) - dataframe groupBy with multiple aggregations?
• Spark SQL - Select all AND computed columns?
• Spark dataframe get column value into a string variable
• Apache Spark, createDataFrame example in Java using List<?> as first argument