Using Guava BloomFilter for Guard Conditions 03.23.2012 When the Guava project released version 11.0, one of the new additions was the BloomFilter class. A BloomFilter is a unique data-structure used to indicate if an element is contained in a set. What makes a BloomFilter interesting is it will indicate if an element is absolutely not contained, or may be contained in a set. This property of never having a false negative makes the BloomFilter a great candidate for use as a guard condition to help prevent performing unnecessary and expensive operations.
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