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Explain countByValue() operation in Apache Spark RDD?

Question Posted / manish verma


Explain countByValue() operation in Apache Spark RDD?..

Answer / Sandeep Rawat

countByValue() is an action that returns the number of occurrences for each unique value in an RDD. The result is a Map[T, Long], where T is the data type of elements in the RDD and Long is the count for each value.

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