Identifying last loop when using for each

Question

I want to do something different with the last loop iteration when performing \'foreach\' on an object. I\'m using Ruby but the same goes for C#, Java etc.

Answer 1

I see a lot of complex, hardly readable code here... why not keep it simple:

var count = list.Length;

foreach(var item in list)
    if (--count > 0)
        Console.WriteLine("Looping: " + item);
    else
        Console.Writeline("Lastone: " + item);

It's only one extra statement!

Another common situation is that you want to do something extra or less with the last item, like putting a separator between the items:

var count = list.Length;

foreach(var item in list)
{
    Console.Write(item);
    if (--count > 0)
        Console.Write(",");
}