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1. Using stat.bloomFilter in Spark 2.0.0 to filter another dataframe

   2017-04-04 Tags: spark, dataframe, filter, join by klotz
2. scala - how to filter out a null value from spark dataframe - Stack Overflow

   df.withColumn("id", when($"id".isNull, 0).otherwise(1)).show

   2017-02-10 Tags: spark, scala, filter, null by klotz

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