GitHub user HyukjinKwon opened a pull request: https://github.com/apache/spark/pull/9655
[SPARK-11687] Mixed usage of fold and foldLeft, reduce and reduceLeft and reduceOption and reduceLeftOption https://issues.apache.org/jira/browse/SPARK-11687 As can be seen here https://github.com/scala/scala/blob/2.12.x/src/library/scala/collection/TraversableOnce.scala, `fold`, `reduce` and `reduceOption` came out from scala 2.9.x. In addition, all the implementations of `fold`, `reduce` and `reduceOption` call actually `foldLeft`, `reduceLeft` and `reduceLeftOption` directly without any additional codes. For developers who are not used to scala, the mixed usages of them might leave a question, for example, if it works as reduceRight or reduceLeft (as all know, the direction can change the results). Even some usages can be found where they work identically the same things. This is just a little nit but I think it would be better to use only `xxxLeft` for readability. Fortunately, there are not so many usages of `xxx` so in this PR, I changed them to `xxxLeft` You can merge this pull request into a Git repository by running: $ git pull https://github.com/HyukjinKwon/spark SPARK-11687 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/9655.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #9655 ---- commit 7949222219ffdba242595bf3ad14dd9c53f68b82 Author: hyukjinkwon <gurwls...@gmail.com> Date: 2015-11-12T07:19:35Z [SPARK-11687][SQL] Mixed usage of fold and foldLeft, reduce and reduceLeft and reduceOption and reduceLeftOption ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org