Question

i am looking for a longest common words c# implementation. Most of the samples i have came across are comparing character by character.

in otherwords,

string1 = access
string2 = advised 

should return null output from the function

any sample codes?

Answer 1

If by word you mean these letter things, seperated from the others by punktuation, try this:

private String longestCommonWord(String s1, String s2)
    {
        String[] seperators = new String[] { " ", ",", ".", "!", "?", ";" };
        var result = from w1 in s1.Split(seperators, StringSplitOptions.RemoveEmptyEntries)
                     where (from w2 in s2.Split(seperators, StringSplitOptions.RemoveEmptyEntries)
                            where w2 == w1
                            select w2).Count() > 0
                     orderby w1.Length descending
                     select w1;
        if (result.Count() > 0)
        {
            return result.First();
        }
        else
        {
            return null;
        }
    }

This probably is not the most elegant way to do it, but it works for me. =)