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[SPARK-13339][DOCS] Clarify commutative / associative operator requirements for reduce, fold
Clarify that reduce functions need to be commutative, and fold functions do not See https://github.com/apache/spark/pull/11091 Author: Sean Owen <sowen@cloudera.com> Closes #11217 from srowen/SPARK-13339.
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- R/pkg/R/pairRDD.R 5 additions, 5 deletionsR/pkg/R/pairRDD.R
- core/src/main/scala/org/apache/spark/Accumulator.scala 3 additions, 3 deletionscore/src/main/scala/org/apache/spark/Accumulator.scala
- core/src/main/scala/org/apache/spark/api/java/JavaPairRDD.scala 16 additions, 16 deletions...rc/main/scala/org/apache/spark/api/java/JavaPairRDD.scala
- core/src/main/scala/org/apache/spark/api/java/JavaRDDLike.scala 1 addition, 1 deletion...rc/main/scala/org/apache/spark/api/java/JavaRDDLike.scala
- core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala 12 additions, 12 deletions...rc/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
- core/src/main/scala/org/apache/spark/rdd/RDD.scala 1 addition, 1 deletioncore/src/main/scala/org/apache/spark/rdd/RDD.scala
- docs/programming-guide.md 1 addition, 1 deletiondocs/programming-guide.md
- docs/streaming-programming-guide.md 2 additions, 2 deletionsdocs/streaming-programming-guide.md
- python/pyspark/rdd.py 3 additions, 4 deletionspython/pyspark/rdd.py
- python/pyspark/streaming/dstream.py 2 additions, 2 deletionspython/pyspark/streaming/dstream.py
- streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaDStreamLike.scala 3 additions, 3 deletions...org/apache/spark/streaming/api/java/JavaDStreamLike.scala
- streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaPairDStream.scala 9 additions, 9 deletions...org/apache/spark/streaming/api/java/JavaPairDStream.scala
- streaming/src/main/scala/org/apache/spark/streaming/dstream/DStream.scala 2 additions, 2 deletions...in/scala/org/apache/spark/streaming/dstream/DStream.scala
- streaming/src/main/scala/org/apache/spark/streaming/dstream/PairDStreamFunctions.scala 8 additions, 8 deletions...apache/spark/streaming/dstream/PairDStreamFunctions.scala
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