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| author | Mark Hamstra <markhamstra@gmail.com> | 2013-02-05 22:19:58 -0800 |
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| committer | Mark Hamstra <markhamstra@gmail.com> | 2013-02-05 22:19:58 -0800 |
| commit | 934a53c8b677df524315a75011b4c9396eb4b54e (patch) | |
| tree | 273cb2e688e393fb6fc52bab8b7d5bd864459c9c /docs/scala-programming-guide.md | |
| parent | 84587a9bf3c734be151251b97ac5af48eb03f4d9 (diff) | |
| download | spark-934a53c8b677df524315a75011b4c9396eb4b54e.tar.gz spark-934a53c8b677df524315a75011b4c9396eb4b54e.tar.bz2 spark-934a53c8b677df524315a75011b4c9396eb4b54e.zip | |
Change docs on 'reduce' since the merging of local reduces no longer preserves
ordering, so the reduce function must also be commutative.
Diffstat (limited to 'docs/scala-programming-guide.md')
| -rw-r--r-- | docs/scala-programming-guide.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/scala-programming-guide.md b/docs/scala-programming-guide.md index 7350eca837..95de4f50bb 100644 --- a/docs/scala-programming-guide.md +++ b/docs/scala-programming-guide.md @@ -203,7 +203,7 @@ A complete list of transformations is available in the [RDD API doc](api/core/in <tr><th>Action</th><th>Meaning</th></tr> <tr> <td> <b>reduce</b>(<i>func</i>) </td> - <td> Aggregate the elements of the dataset using a function <i>func</i> (which takes two arguments and returns one). The function should be associative so that it can be computed correctly in parallel. </td> + <td> Aggregate the elements of the dataset using a function <i>func</i> (which takes two arguments and returns one). The function should be commutative and associative so that it can be computed correctly in parallel. </td> </tr> <tr> <td> <b>collect</b>() </td> |