BloomFilter ( uint64_t num_keys, float fpp = 0.05f )
constructor of BloomFilter
Calculates the size of the bloom-filter based on the number of unique keys and the equation provided in: https://en.wikipedia.org/wiki/Bloom_filter, as well as allocates buffer for the internal hash-table
Parameters:
| num_keys | number of unique keys to be built into the hash-table of the bloom-filter |
| fpp | false positive probability (5% by default) |