Finding difference in two strings.

Lawrence Pond

8y1.2kLINQ

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";

9 Replies

Know the answer? Post it — somebody with the same question will find it here.

Lawrence Pond8y ago
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,
+1
ANIL JENA8y ago
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 < Questions.Count(); i++)
{
response.Add(Questions[i].ToString());
}
for (int i = 0; i < Answers.Count(); i++)
{
correctans.Add(Answers[i].ToString());
}
for (int j = 0; j < Questions.Count(); 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;
}
}
+1
Rajeesh Menoth8y ago
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
+1
Laxmidhar Sahoo8y ago
sir according your problem explain mr
Dharmraj Thakur is currect
+1
Rajkiran Swain8y ago
1. class Program
2. {
3. static void Main(string[] args)
4. {
5. var result = Intersect();
6. Console.WriteLine(result);
7. }
9. private static string Intersect()
10. {
11. string test1 = "a,b,c,d,e";
12. string test2 = "b,e";
13. return string.Join(",", test1.ToArray().Where(item => !test2.Contains(item.ToString())).ToArray());
14. }
15. }
+1

Lawrence Pond8y ago

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 Pond8y ago

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

Altaf Ansari8y ago

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());

-1

Dharmraj Thakur8y ago

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();
}

Finding difference in two strings.

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";

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 < Questions.Count(); i++)

{

response.Add(Questions[i].ToString());

}

for (int i = 0; i < Answers.Count(); i++)

{

correctans.Add(Answers[i].ToString());

}

for (int j = 0; j < Questions.Count(); 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;

}