public ulong[] Hash(string text)
{
var words = text.Split();
var hashes = Enumerable.Range(0, _hashCount)
.Select(_ => ulong.MaxValue)
.ToArray();
foreach (var grams in words.GetNGrams(_gramCount))
{
var gram = string.Join(' ', grams);
var newHashes = new ulong[_hashCount];
foreach (var i in Enumerable.Range(0, _hashCount))
{
newHashes[i] = HashTools.GetLongHash(gram, i);
}
hashes = hashes
.Zip(newHashes, Math.Min)
.ToArray();
}
return(hashes);
}