Finding difference in two strings.

Question

I want to use LINQ to find the difference in two string   The first string is the correct Answer the second is a users Quiz what I need to know is what questions they answerd incorrectly the question number and there respose.   results expected "1x,2a,3b,10b,20b"   var Answer = "A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B"; var Quiz = "x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B";

Dharmraj Thakur · Answer

You can do like this...

static void Main(string[] args)
{
StringBuilder result = new StringBuilder();
string Answer = "A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B";
string Quiz = "x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B";
string[] Answers = Answer.Split(',');
string[] Questions = Quiz.Split(',');
if (Answer.Length == Quiz.Length)
{
int loopleng = Answer.Length;
for (int i = 0; i < loopleng; i++)
{
if (Answer[i] != Quiz[i])
{
result.Append((i+1) + "" + Quiz[i] + ",");
}
}
}
Console.Write(result.ToString());
Console.ReadKey();
}

Lawrence Pond · Answer

SOLUTION var Answer =  "A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B" .Split( ',' ).ToArray();   var Quiz =  "x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B" .Split( ',' ).ToArray();   var process = Answer.Select( (a,index)=>  new { a, index})   .Where(a => a.a != Quiz[a.index])   .Select (a => new {index= (a.index+1),Quiz= Quiz[a.index]})   foreach (var p  in  process)   {   Console.Write(String.Format( "{0}{1}," ,p.a,p.index));   }   Output   A1,B2,D3,A10,D20,

ANIL JENA · Answer

protected void Page_Load(object sender, EventArgs e) { var Answer = "A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B"; var Quiz = "x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B"; int correstresult = 0; int wrongresult = 0; string correstquestionlist = ""; string wrongquestionlist = ""; ArrayList correctans = new ArrayList(); ArrayList response = new ArrayList(); string[] Answers = Answer.Split(','); string[] Questions = Quiz.Split(','); //data add in correct arraylist for (int i = 0; i { response.Add(Questions[i].ToString()); } for (int i = 0; i { correctans.Add(Answers[i].ToString()); } for (int j = 0; j { if (correctans[j] == response[j]) { correstresult++; if (correstquestionlist == "") { correstquestionlist = (j + 1).ToString(); } else { correstquestionlist = correstquestionlist + "," + (j + 1).ToString(); } } else { wrongresult++; if (wrongquestionlist == "") { wrongquestionlist = (j + 1).ToString(); } else { wrongquestionlist = wrongquestionlist + "," + (j + 1).ToString(); } } Label1.Text = wrongquestionlist; Label2.Text = correstquestionlist; } }

Rajeesh Menoth · Answer

Hi,   The answer given by Altaf Ansari is wrong based on your question. The given answer only display "X" as the output. You can visit his answer through the following link.   https://dotnetfiddle.net/Z8qbPv

Laxmidhar Sahoo · Answer

sir according your problem explain mr Dharmraj Thakur is currect

Rajkiran Swain · Answer

class Program   {        static  void Main(string[] args)       {           var result = Intersect();           Console.WriteLine(result);       }           private  static  string Intersect()       {           string test 1  =  "a,b,c,d,e" ;           string test 2  =  "b,e" ;           return string.Join( "," , test 1 .ToArray().Where(item => !test 2 .Contains(item.ToString())).ToArray());       }   }

Lawrence Pond · Answer

A Working  Solution
var Answer =  "A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B" .Split( ',' ).ToArray();
var Quiz =  "x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B" .Split( ',' ).ToArray();
List string > myList =  new  List string >();
myList = Answer.Select( (a,index)=>  new { a, index})
.Where(a => ! a.a.Contains(Quiz[a.index]))
.Select (a =>  string .Concat((a.index+1).ToString(),a.a.ToString() ).ToLower()).ToList();
Console.Write(myList.Aggregate ((a,b) => a+ ',' +b));
Output :1a,2b,3d,10a,20d
I wanted to avoid looping example foreach, while ... because it adds unnecessary lines of code since the results are iEnumerable Linq was an excellent way to solve this problem.

Lawrence Pond · Answer

The output is not only the answer but also the index in Or question number 2a,4d ...

Altaf Ansari · Answer

Please try this ;

string Answer = "A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B";
string Quiz = "x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B";
string result = string.Join(",",Quiz.Split(',').Where(item => !Answer.Split(',').ToList().Contains(item)).ToArray());