Example usage for org.apache.mahout.cf.taste.impl.common FastByIDMap rehash

Introduction

In this page you can find the example usage for org.apache.mahout.cf.taste.impl.common FastByIDMap rehash.

Prototype

public void rehash() 

Source Link

Usage

From source file:net.ufida.info.mahout.common.MemoryDiffStorage.java

License:Apache License

private void pruneInconsequentialDiffs() {
    // Go back and prune inconsequential diffs. "Inconsequential" means, here, only represented by one
    // data point, so possibly unreliable
    Iterator<Map.Entry<Long, FastByIDMap<RunningAverage>>> it1 = averageDiffs.entrySet().iterator();
    while (it1.hasNext()) {
        FastByIDMap<RunningAverage> map = it1.next().getValue();
        Iterator<Map.Entry<Long, RunningAverage>> it2 = map.entrySet().iterator();
        while (it2.hasNext()) {
            RunningAverage average = it2.next().getValue();
            if (average.getCount() <= 1) {
                it2.remove();/*  w w w.  j  a va 2 s . c  om*/
            }
        }
        if (map.isEmpty()) {
            it1.remove();
        } else {
            map.rehash();
        }
    }
    averageDiffs.rehash();
}

---