public BloomFilter(int size = 1024, int hashCount = 8)
{
if (size < 1)
{
throw new ArgumentException("You must have at least 1 item in the filter");
}
if (hashCount < 1)
{
throw new ArgumentException("You must have at least 1 hash");
}
Bits = new bool[size];
var rand = new Random();
Hashes = Enumerable
.Repeat(int.MaxValue, hashCount)
.Select(max => rand.Next(0, max))
.Select(seed => {
Func <byte[], uint> func = bytes => MurmurHash3.Hash32(bytes, (uint)seed);
return(func);
})
.ToArray();
}
private static uint GetMurmurHashValue(string word)
{
const uint seed = 9;
var encodedWord = Encoding.ASCII.GetBytes(word);
uint hashResult = MurmurHash3.Hash32(encodedWord, seed);
return(hashResult);
}