LINQ to find array indexes of a value

Question

Assuming I have the following string array:

string[] str = new string[] {\"max\", \"min\", \"avg\", \"max\", \"avg\", \"min\"}

Is it possbile t

Answer 1

You need a combined select and where operator, comparing to accepted answer this will be cheaper, since won't require intermediate objects:

public static IEnumerable SelectWhere(this IEnumerable source, Func filter, Func selector)
        {
            int index = -1;
            foreach (var s in source)
            {
                checked{ ++index; }
                if (filter(s))
                    yield return selector(s, index);
            }
        }