How to compare two string and then print the difference

Question

2.00/5 (3 votes)

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for ex. string s1=jersey;

string s2=jry;

print using asterisk j*r**y

is there any algorithm to compare two string and then write the diff.
btw I'm using VS C# ASP.net web application

thanks

Posted 13-Apr-16 13:53pm

Member 12457838

Updated 21-Apr-16 21:44pm

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v2

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Comments

Matt T Heffron 13-Apr-16 20:07pm

What is the code that you already have?
(You do already have some code to do this, right?! Even if it doesn't work...)
Just show us the part where you tried to find the difference.
The rest should just be "standard" ASP.net to do a web page.

PIEBALDconsult 13-Apr-16 21:29pm

Do you want the https://en.wikipedia.org/wiki/Levenshtein_distance ?
Or https://en.wikipedia.org/wiki/Approximate_string_matching ?

Sergey Alexandrovich Kryukov 14-Apr-16 1:48am

I have no idea what "difference" means. I guess, nobody knows unless you explain it precisely. If you formulate it strictly, it will be some 80% of solution, or even more.
—SA

Sergey Alexandrovich Kryukov 14-Apr-16 1:48am

...

Member 12003400 14-Apr-16 3:21am

yes provide what kind of difference you needed? You cant to fetch missing character or different characters or case of letter,,can be so many parameters.

Richard Deeming 14-Apr-16 9:16am

Are you looking for something like DiffPlex[^]?

FARONO 15-Apr-16 7:26am

I would say:
Take the longest, compare each char one by one, add char to a string if it exists or * if not..

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Herman<T>.Instance · Answer 1 · 2016-04-21T21:44:00

With LINQ you can use EXCEPT.
An example is given here Enumerable.Except(TSource) Method (IEnumerable(TSource), IEnumerable(TSource)) (System.Linq)[^]
Make two enumarables from each string (or 2 arrays of char) compare those with EXCEPT.

Example CONSOLE APP:

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DiffExcept
{
    class Program
    {
        static void Main(string[] args)
        {

            string s1 = "jersey";
            string s2 = "jry";

            char[] c1 = s1.ToCharArray();
            char[] c2 = s2.ToCharArray();

            var diff = s1.Except(s2);
            string newS1 = s1;
            foreach(var value in diff)
            {
                newS1 = newS1.Replace(value, '*');
                Console.WriteLine(value);
            }
            Console.WriteLine(newS1);
            Console.Read();
        }
    }
}

madhav_jain · Answer 2 · 2016-04-21T21:17:00

I think below code hip you

C#

string s1 = "jersey";
            string s2 = "jry";
            string final = string.Empty;
            char[] aa = s1.ToCharArray();
            foreach (char aaa in aa)
            {
                final = final + "*";
            }
            char[] bb = s2.ToCharArray();
            int startindex=0;
            foreach (char bbb in bb)
            {
                foreach (char aaa in aa)
                {
                    if (s1.IndexOf(bbb, startindex) > -1)
                    {
                        final = final.Remove(s1.IndexOf(bbb, startindex), 1);
                        final = final.Insert(s1.IndexOf(bbb, startindex), bbb.ToString());
                        startindex = s1.IndexOf(bbb, startindex) + 1;
                    }
                    
                }

            }
            Response.Write(final);

How to compare two string and then print the difference

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