public HashSet <string> ToHashset(string text, NGramsType ngramsType)
{
var hs = new HashSet <string>();
FillHashset(hs, text, ngramsType);
return(hs);
}
public void FillHashset(HashSet <string> hs, string text, NGramsType ngramsType)
{
var terms = Run(text); //Tokenizer.ParseText( text );
hs.Clear();
//NGramsType.NGram_1:
foreach (var term in terms)
{
if (term != null)
{
hs.Add(term);
}
}
var ngrams = default(IEnumerable <string>);
switch (ngramsType)
{
case NGramsType.NGram_2:
ngrams = GetNGrams_2(terms);
break;
case NGramsType.NGram_3:
ngrams = GetNGrams_2(terms).Concat(GetNGrams_3(terms));
break;
case NGramsType.NGram_4:
ngrams = GetNGrams_2(terms).Concat(GetNGrams_3(terms)).Concat(GetNGrams_4(terms));
break;
}
if (ngrams != null)
{
foreach (var ngram in ngrams)
{
hs.Add(ngram);
}
ngrams = null;
}
terms = null;
}
public void Fill_TF_Dictionary(Dictionary <string, int> tfDictionary, string text, NGramsType ngramsType)
{
var terms = Run(text);
tfDictionary.Clear();
var count = default(int);
//NGramsType.NGram_1:
foreach (var term in terms)
{
//if ( term != null )
//{
if (tfDictionary.TryGetValue(term, out count))
{
tfDictionary[term] = count + 1;
}
else
{
tfDictionary.Add(term, 1);
}
//}
}
var ngrams = default(IEnumerable <string>);
switch (ngramsType)
{
case NGramsType.NGram_2:
ngrams = GetNGrams_2(terms);
break;
case NGramsType.NGram_3:
ngrams = GetNGrams_2(terms).Concat(GetNGrams_3(terms));
break;
case NGramsType.NGram_4:
ngrams = GetNGrams_2(terms).Concat(GetNGrams_3(terms)).Concat(GetNGrams_4(terms));
break;
}
if (ngrams != null)
{
foreach (var ngram in ngrams)
{
if (tfDictionary.TryGetValue(ngram, out count))
{
tfDictionary[ngram] = count + 1;
}
else
{
tfDictionary.Add(ngram, 1);
}
}
ngrams = null;
}
terms = null;
}