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From "Sean Owen (Commented) (JIRA)" <>
Subject [jira] [Commented] (MAHOUT-821) MemoryDiffStorage mistake in recommendable items method
Date Wed, 28 Sep 2011 07:40:45 GMT


Sean Owen commented on MAHOUT-821:

Hmm, not sure I see the bug. The logic looks correct. Recommendable items are all items that
the user does not already know about. So, an item is removed if there is a non-null pref from
the user for that item. Which test here would test this -- it should not work if changed this
> MemoryDiffStorage mistake in recommendable items method
> -------------------------------------------------------
>                 Key: MAHOUT-821
>                 URL:
>             Project: Mahout
>          Issue Type: Bug
>            Reporter: Lance Norskog
>            Priority: Minor
>         Attachments: short.patch
> The MemoryDiffStorage class has a "positive/negative" bug in building a list of "recommendable
items". Attached patch fixes the bug and includes updates for various unit tests. 

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