[GitHub] incubator-hivemall pull request #167: [HIVEMALL-220] Implement Cofactor

[myui]

Github user myui commented on a diff in the pull request:

    https://github.com/apache/incubator-hivemall/pull/167#discussion_r226578153
  
    --- Diff: core/src/main/java/hivemall/fm/Feature.java ---
    @@ -383,4 +383,10 @@ public static void l2normalize(@Nonnull final 
Feature[] features) {
             }
         }
     
    +    @Override
    --- End diff --
    
    Why this `equals` method is required? Assume this is not used.


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