private string FormatTfIdf(WeightedPosting posting)
{
IEnumerable <string> summands = Enumerable
.Range(0, posting.TFs.Length)
.Select(x => string.Format("{0:F5}×{1:F5} ({2})", posting.TFs[x], posting.IDFs[x], terms[x]));
return(string.Join(" + ", summands.ToArray()));
}
private Hit ConvertDocumentIdToHit(WeightedPosting posting, ParsedQuery query)
{
string formattedDocumentId = string.Format("{0:D6}", posting.PostingId);
var document = new Document(formattedDocumentId);
var snippet = new SnippetGenerator(query, document).GenerateSnippet();
return
(new Hit
{
DocumentId = formattedDocumentId,
Description = GetDescription(posting.PostingId, string.Format("№{0}", formattedDocumentId)),
DebugInfo =
new[]
{
string.Format("tf-idf = {0:F5} = {1}", Ranker.GetTfIdf(posting), FormatTfIdf(posting)),
string.Format("ExactWordMatchCount = {0}", posting.ExactWordMatchCount)
},
Snippet = string.Join(" … ", snippet.Skip(1).ToArray()),
Title = snippet.First(),
});
}
