Question

I have 2 arrays.

String[] arrFirst={"a","b","c","d","e"};
String[] arrSecond={"a","b","f","d","g"};
String[] arrThird={"a","f","g","h","e"};

I want the results like for arrFirst and arrSecond , the result is 3

For arrFirst and arrThird, the result is 2

All the code that I found are comparing two arrays and return whether they are example the same or not.

But what I want is how many are matched.

I can do the looping way.

But I think it will take too much time and I am wondering whether there is any faster way.

Thanks..

Answer 1

You can use Intersect method.

    String[] arrFirst={"a","b","c","d","e"};
    String[] arrSecond={"a","b","f","d","g"};
    String[] arrThird={"a","f","g","h","e"};

    arrFirst.Intersect(arrSecond).Count(); // 3
    arrFirst.Intersect(arrThird).Count(); //2