scala> var rdd1=sc.parallelize(List((1,"a"),(4,"he"),(2,"b"),(3,"c")))
scala> rdd1.lookup(4).getClass.getMethods.map(_.getName).sorted

?

實驗結果:

res36: Array[String] = Array(hashCode, update, length, apply, apply, array, array, elemTag, last, clone, clone, isEmpty, startsWith, endsWith, toArray, iterator, make, find, zip, init, reverse, exists, empty, head, slice, copyToArray, tail, foreach, toSeq, canBuildFrom, newBuilder, companion, seq, seq, seq, seq, seq, seq, seq, seq, seq, thisCollection, thisCollection, thisCollection, thisCollection, thisCollection, thisCollection, toCollection, toCollection, toCollection, toCollection, toCollection, toCollection, parCombiner, isDefinedAt, reverseIterator, takeRight, dropRight, segmentLength, lengthCompare, indexWhere, lastIndexWhere, groupBy, forall, drop, take, takeWhile, dropWhile, span, splitAt, toTraversable, toBuffer, stringPrefix, view, view, view, view, ...

?

參考:

https://stackoverflow.com/questions/2886446/how-to-get-methods-list-in-scala

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