/// <summary>
/// This a general function that implements the calculation of (CalcNumberOfItemsFromRightToWrong, CalcNumberOfItemsFromWrongToRight, CalcNumberOfItemsFromWrongToWrong) methods
/// </summary>
/// <param name="snapshotTable"></param>
/// <param name="condition"></param>
/// <returns></returns>
public int GeneralFunc2(List <Snapshot> snapshotTable, PassConditionForChangingAnswers condition)
{
var snapshotByItemNum = snapshotTable.GroupBy(x => x.ItemNum);
int numberOfAttempts = 0;
foreach (var snapsForEachItem in snapshotByItemNum)
{
var lastAnswer = snapsForEachItem.LastOrDefault().Response;
var correctAnswer = "Choice(s): " + correctAnswerList[snapsForEachItem.Key];
if (condition(snapsForEachItem, correctAnswer, lastAnswer))
{
numberOfAttempts++;
}
}
return(numberOfAttempts);
}
public void CalcNumberOfItemsFromWrongToWrongFirstAndLast(List <Snapshot> snapshotTable)
{
PassConditionForChangingAnswers ConditionForAnswersWrongToWrongFirstAndLast = GetConditionForAnswersWrongToWrongFirsAndtLast;
this.NumberOfItemsAnswerWasFromWrongToWrongFirstAndLast = GeneralFunc2(snapshotTable, ConditionForAnswersWrongToWrongFirstAndLast);
}
/// <summary>
/// This function checks the first and final answer of a question; if they are both correct, it checks the other visits' answers, and if it finds a wrong answer amongst the previous visits, it consders the answer "from right to wrong to right".
/// </summary>
/// <param name="snapshotTable"></param>
public void CalcNumberOfItemsFromRightToWrongToRight(List <Snapshot> snapshotTable)
{
PassConditionForChangingAnswers ConditionForAnswersWrongToRight = GetConditionForAnswersRightToWrongToRight;
this.NumberOfItemsFromRightToWrongToRight = GeneralFunc2(snapshotTable, ConditionForAnswersWrongToRight);;
}
