foreach with index [duplicate]

Answer 1

I keep this extension method around for this:

public static void Each(this IEnumerable ie, Action action)
{
    var i = 0;
    foreach (var e in ie) action(e, i++);
}

And use it like so:

var strings = new List();
strings.Each((str, n) =>
{
    // hooray
});

Or to allow for break-like behaviour:

public static bool Each(this IEnumerable ie, Func action)
{
    int i = 0;
    foreach (T e in ie) if (!action(e, i++)) return false;
    return true;
}

var strings = new List() { "a", "b", "c" };

bool iteratedAll = strings.Each ((str, n)) =>
{
    if (str == "b") return false;
    return true;
});