static public Quiz getQuiz(int beginRank, int endRank, int numberOfVariant)
{
List <DictionaryItem> currentList = itemList.Where(x => (x.rank >= beginRank) && (x.rank <= endRank)).ToList();
double representFrequency = TotalFrequency(currentList) / TotalFrequency(itemList);
Quiz result = new Quiz();
Random ran = new Random();
int item = ran.Next(currentList.Count);
DictionaryItem trueResponse = currentList[item];
result.word = trueResponse.word;
result.ansverNumber = ran.Next(numberOfVariant);
result.reprezentNumber = currentList.Count;
result.reprezentFrecuency = representFrequency;
result.rank = trueResponse.rank;
for (int i = 0; i < numberOfVariant; i++)
{
if (i == result.ansverNumber)
{
result.translationList.Add(trueResponse.translation);
}
else
{
List <string> listOfVar = GetVariantList(currentList, trueResponse, result);
if (listOfVar.Count > 0)
{
result.translationList.Add(listOfVar[ran.Next(listOfVar.Count)]);
}
else
{
List <string> listOfVar2 = GetVariantList(itemList, trueResponse, result);
if (listOfVar2.Count > 0)
{
result.translationList.Add(listOfVar2[ran.Next(listOfVar.Count)]);
}
else
{
result.translationList.Add("");
}
}
}
}
return(result);
}
static private List <string> GetVariantList(List <DictionaryItem> DictList, DictionaryItem trueResponse, Quiz CurrentResult)
{
return(DictList.Where(x => ((x.pos == trueResponse.pos) && (x.translation != trueResponse.translation)))
.Where(x => (isInto(CurrentResult.translationList, x.translation) == false))
.Select(x => x.translation).ToList());
}
