[jira] [Resolved] (SPARK-6901) ParamGridBuilder.build with no grids should return an empty array

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-6901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-6901.
------------------------------
       Resolution: Won't Fix
    Fix Version/s:     (was: 1.4.0)

Resolving per PR discussion

> ParamGridBuilder.build with no grids should return an empty array
> -----------------------------------------------------------------
>
>                 Key: SPARK-6901
>                 URL: https://issues.apache.org/jira/browse/SPARK-6901
>             Project: Spark
>          Issue Type: Bug
>          Components: ML
>    Affects Versions: 1.3.0
>            Reporter: Peter Rudenko
>            Priority: Minor
>
> ParamGridBuilder.build with no grids returns array with an empty param map. 
> {code}
> (new ParamGridBuilder).build().size == 1
> {code}
> I have a logic if ParamGridBuilder is empty - then not use CrossValidator. It confuses because if the ParamGridBuilder has one grid it will also return an array of size 1:
> {code}
> (new ParamGridBuilder).addGrid(lr.regParam, Array(0.1)).build().size == 1
> {code}



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