Package org.apache.mahout.cf.taste.impl.common

Examples of org.apache.mahout.cf.taste.impl.common.FastIDSet.retainAll()

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    while (!intersection.isEmpty() && (i < itemIDs.length)) {
      userIDs = preferenceForItems.get(itemIDs[i]);
      if (userIDs == null) {
        throw new NoSuchItemException();
      }
      intersection.retainAll(userIDs);
      i++;
    }
    return intersection.size();
  }
 
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    while (!intersection.isEmpty() && i < itemIDs.length) {
      userIDs = preferenceForItems.get(itemIDs[i]);
      if (userIDs == null) {
        throw new NoSuchItemException();
      }
      intersection.retainAll(userIDs);
      i++;
    }
    return intersection.size();
  }
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