static public TDict BuildTDict(string s, int size, TDict t)
{
string prev = "";
foreach (string word in Chunk(s, size))
{
if (t.ContainsKey(prev))
{
WDict w = t[prev];
if (w.ContainsKey(word))
{
w[word] += 1;
}
else
{
w.Add(word, 1);
}
}
else
{
t.Add(prev, new WDict()
{
{ word, 1 }
});
}
prev = word;
}
return(t);
}
static private string Choose(WDict w)
{
long total = w.Sum(t => t.Value);
while (true)
{
int i = r.Next(0, w.Count);
double c = r.NextDouble();
System.Collections.Generic.KeyValuePair <string, uint> k = w.ElementAt(i);
if (c < (double)k.Value / total)
{
return(k.Key);
}
}
}
static public string BuildString(TDict t, int len, bool exact, string seed = "")
{
string last;
List <string> ucStr = new List <string>();
StringBuilder sb = new StringBuilder();
if (seed == "")
{
foreach (string word in t.Keys.Skip(1))
{
if (char.IsUpper(word.First()))
{
ucStr.Add(word);
}
}
}
else
{
ucStr.Add(seed);
}
if (ucStr.Count > 0)
{
sb.Append(ucStr.ElementAt(r.Next(0, ucStr.Count)));
}
last = sb.ToString();
sb.Append(" ");
WDict w = new WDict();
for (uint i = 0; i < len; ++i)
{
if (t.ContainsKey(last))
{
w = t[last];
}
else
{
w = t[""];
//sb.Append(" ");
}
last = MarkovHelper.Choose(w);
sb.Append(last.Split(' ').Last()).Append(" ");
}
if (!exact)
{
while (last.Last() != '.')
{
if (t.ContainsKey(last))
{
w = t[last];
}
else
{
w = t[""];
}
last = MarkovHelper.Choose(w);
sb.Append(last.Split(' ').Last()).Append(" ");
}
}
return(sb.ToString());
}
