WebIn the inheritance hierarchy below Iterable you find three traits: Seq, Set, and Map. Seq and Map implement the PartialFunction trait with its apply and isDefinedAt methods, each implemented differently. Set gets its apply method from GenSetLike.. For sequences, apply is positional indexing, where elements are always numbered from 0.That is, Seq(1, 2, … WebI have a csv file containing key-value pairs; it can have multiple records for the same key. I am writing a mapreduce program to aggregate this data - for each key, it is supposed to give the frequency of key and sum of values for the key. My mapper reads the csv file and emits both key and value a
org.apache.hadoop.hive.serde2.io.HiveDecimalWritable java
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