In Apache Spark map example, we’ll learn about all ins and outs of map function. Basically map is defined in abstract class RDD in spark and it is a transformation kind of operation which means it is a lazy operation. Let’s explore it in detail.
Same as Java Map, Scala Map is the collection(Iterable) of various key and value pairs in Scala Collections. All keys in Map are unique and associated with a value. Same as List and Set, Scala Maps are also having two types immutable and mutable.