public Result <Dictionary <string, int> > GetWordsFrequencyDict()
{
var linesResult = textReader.GetLines();
if (!linesResult.IsSuccess)
{
return(Result.Fail <Dictionary <string, int> >(linesResult.Error));
}
return(Result.Ok(linesResult.Value
.SelectMany(l => wordPattern.Matches(l).Cast <Match>().Select(m => m.Value))
.Where(cw => !dullWordsEliminator.IsDull(cw))
.GroupBy(cw => cw.ToLower())
.ToDictionary(wg => wg.Key, wg => wg.Count())));
}