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SPARK-5270 [CORE] Provide isEmpty() function in RDD API
Pretty minor, but submitted for consideration -- this would at least help people make this check in the most efficient way I know. Author: Sean Owen <sowen@cloudera.com> Closes #4074 from srowen/SPARK-5270 and squashes the following commits: 66885b8 [Sean Owen] Add note that JavaRDDLike should not be implemented by user code 2e9b490 [Sean Owen] More tests, and Mima-exclude the new isEmpty method in JavaRDDLike 28395ff [Sean Owen] Add isEmpty to Java, Python 7dd04b7 [Sean Owen] Add efficient RDD.isEmpty()
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- core/src/main/scala/org/apache/spark/api/java/JavaRDDLike.scala 10 additions, 0 deletions...rc/main/scala/org/apache/spark/api/java/JavaRDDLike.scala
- core/src/main/scala/org/apache/spark/rdd/RDD.scala 6 additions, 0 deletionscore/src/main/scala/org/apache/spark/rdd/RDD.scala
- core/src/test/java/org/apache/spark/JavaAPISuite.java 21 additions, 0 deletionscore/src/test/java/org/apache/spark/JavaAPISuite.java
- core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala 9 additions, 0 deletionscore/src/test/scala/org/apache/spark/rdd/RDDSuite.scala
- project/MimaExcludes.scala 4 additions, 0 deletionsproject/MimaExcludes.scala
- python/pyspark/rdd.py 12 additions, 0 deletionspython/pyspark/rdd.py
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