GitHub user keypointt opened a pull request:

    https://github.com/apache/spark/pull/14836

    [MINOR][MLlib][SQL] Clean up unused variables and unused import

    ## What changes were proposed in this pull request?
    
    Clean up unused variables and unused import statements, unnecessary 
`return` and `toArray`, and some more style improvement,  when I walk through 
the code examples.
    
    ## How was this patch tested?
    
    Testet manually on local laptop.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/keypointt/spark codeWalkThroughML

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/14836.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 #14836
    
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commit 4e385f3d5a86671fc77a72f7f4738f71e4ce0b47
Author: Xin Ren <[email protected]>
Date:   2016-08-19T20:34:47Z

    minor change

commit d879a0efecfc913c00d4f1cb3788ccc67ecdd072
Author: Xin Ren <[email protected]>
Date:   2016-08-19T20:34:56Z

    Merge branch 'master' of https://github.com/apache/spark into 
codeWalkThroughML

commit 71ae4e5ddc5681a1ef3953f1a68f6b6cf6f38b24
Author: Xin Ren <[email protected]>
Date:   2016-08-19T21:46:42Z

    more specific exception, in consistant with other tests

commit 7624ac89582143906011fe81b49e0c5c9d75670f
Author: Xin Ren <[email protected]>
Date:   2016-08-22T18:43:28Z

    Merge branch 'master' into codeWalkThroughML

commit c9a119236399657d5dd59b85b2fae8c02528d788
Author: Xin Ren <[email protected]>
Date:   2016-08-22T19:49:14Z

    tmp save

commit 37e4066feb33e7cbf91d4f09d96a1a79b0aea3e1
Author: Xin Ren <[email protected]>
Date:   2016-08-22T23:42:05Z

    Merge branch 'master' into codeWalkThroughML

commit 73df78aca1f1446f2e370ccc844b10767536d830
Author: Xin Ren <[email protected]>
Date:   2016-08-24T21:51:45Z

    Merge branch 'master' into codeWalkThroughML

commit e192cb5e3243cbbe1a7e93aa2133b1fd1c125dc2
Author: Xin Ren <[email protected]>
Date:   2016-08-25T21:18:00Z

    Merge branch 'master' into codeWalkThroughML

commit 067d3b772b59400ab228c5df4fe88e3dab14aa32
Author: Xin Ren <[email protected]>
Date:   2016-08-25T22:08:32Z

    remove unused import

commit 221a5bb4995cb61c4edff91fd226d6e2310e006b
Author: Xin Ren <[email protected]>
Date:   2016-08-25T22:36:37Z

    remove unused import

commit 039c3b08b28d9c178963318f1eb133aae1087643
Author: Xin Ren <[email protected]>
Date:   2016-08-26T00:49:09Z

    remove redundant conversion

commit ce19b11e4dc8fa199edffa8821b895125810f4f2
Author: Xin Ren <[email protected]>
Date:   2016-08-26T00:53:10Z

    val plan is not used

commit 43c444b61e216187aab493c7d0eef21519f93ae2
Author: Xin Ren <[email protected]>
Date:   2016-08-26T20:27:07Z

    more sytle improvement

commit ec656eccfb010ed1c4c86362a51acea8bc4ee2f5
Author: Xin Ren <[email protected]>
Date:   2016-08-26T21:02:58Z

    Merge branch 'master' into codeWalkThroughML

----


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