foreach (var o in collection.Select((item,index)=>new {item, index}))
{
  o.index;
}

WH>Казалось бы при чем тут nemerle?

Автор: VladD2
Дата: 23.07.10

foreach ((x, i) in xs.WithIndex())

int i = 0;
foreach (object o in collection)
{

//any

i++;
}

foreach (object o in collection)
{
//any with o.Index
}

public static class Extensions
{
    public sealed class Indexed<T>
    {
        private Indexed(T item, int index)
        {
            this.Item = item;
            this.Index = index;
        }
    
        public T Item { get; private set; }
        public int Index { get; private set; }
   }

    public static IEnumerable<Indexed<T>> Indexed<T>(this IEnumerable<T> seq)
    {
        return seq.Select( (v,i) => new Indexed<T>(v,i) );
    }

    public static IEnumerable<T> RemoveIndex<T>(this IEnumerable<Indexed<T>> seq)
    {
        return seq.Select( x => x.Item );  
    }
}

S>>foreach (var o in collection.Select((item,index)=>new {item, index}))
S>>{
S>>  o.index;
S>>}
S>>

S>>?

from v in c.Cast<object>.Skip(5).Take(5)
select v;

class A { public int Index { get;set; } }

// ...

foreach (A o in collection)
{
 //any with o.Index
}

_>foreach (object o in collection)
_>{
_>//any with o.Index
_>}
_>

for i, v in pairs(collection)
do

end

import std.stdio;

void main()
{
    string a = "Test";

    foreach (int i, char c; a)
    {
        writeln(i, "  : ", c);
    }
    
    foreach (char c; a)
    {
        writeln(c);
    }
}

list.Skip(5).Take(5)

        static void Main(string[] args)
        {
            var c = (IEnumerable) new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
            foreach (var i in c.Cast<object>().Skip(5).Take(5))
                Console.WriteLine(i);

            Console.ReadKey();
        }

var lst = new ArrayList { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

foreach (object i in lst.Cast<object>().Skip(5).Take(5))
    Console.WriteLine(i);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace linq.non.generic
{
    class A : IEnumerable
    {
        #region IEnumerable Members

        public IEnumerator GetEnumerator()
        {
            for (int i = 1; i <= 10; i++)
                yield return i;
        }

        #endregion
    }

    class Program
    {
        static void Main(string[] args)
        {
            var c = new A();
            foreach (var i in c.Cast<object>().Skip(5).Take(5))
                Console.WriteLine(i);

            Console.ReadKey();
        }
    }
}

foreach(x in collection with index)
{
.....
}