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

While you could use a combination of Select and Where, this is likely a good candidate for making your own function:

public static IEnumerable Indexes(IEnumerable source, T itemToFind)
{
    if (source == null)
        throw new ArgumentNullException("source");

    int i = 0;
    foreach (T item in source)
    {
        if (object.Equals(itemToFind, item))
        {
            yield return i;
        }

        i++;
    }
}