[Hama Wiki] Trivial Update of "InterfaceConsiderations" by udanax

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The following page has been changed by udanax:
http://wiki.apache.org/hama/InterfaceConsiderations

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        OutputCollector<ImmutableBytesWritable, VectorWritable> output,
        Reporter reporter) throws IOException {
  
-     /* Do something */
+     value.scale(0.5);
      output.collect(key, value);
    }