[jira] [Commented] (SPARK-18466) Missing withFilter method causes warnings when using for comprehensions

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-18466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15669545#comment-15669545 ] 

Apache Spark commented on SPARK-18466:
--------------------------------------

User 'reggert' has created a pull request for this issue:
https://github.com/apache/spark/pull/15899

> Missing withFilter method causes warnings when using for comprehensions
> -----------------------------------------------------------------------
>
>                 Key: SPARK-18466
>                 URL: https://issues.apache.org/jira/browse/SPARK-18466
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.6.1, 1.6.2, 1.6.3, 2.0.0, 2.0.1, 2.0.2
>            Reporter: Richard W. Eggert II
>            Priority: Minor
>              Labels: easyfix
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> The fact that the RDD class has a {{filter}} method but not a {{withFilter}} method results in compiler warnings when using RDDs in {{for}} comprehensions. As of Scala 2.12, falling back to use of {{filter}} is no longer supported, so {{for}} comprehensions that use filters will no longer compile. Semantically, the only difference between {{withFilter}} and {{filter}} is that {{withFilter}} is lazy, and since RDDs are lazy by nature, one can simply be aliased to the other.



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