gistfile1.cs

/*
Stole this concept from Python. IMO it helps reduce clutter
in non-performance optimized loops. No dealing with incrementing
or setting the same condition time after time.
*/

/// Incrementing usage example:
foreach(var i in A.Range(0,10))
{
    Print(i);
}

// Prints out: 0123456789
/// End of example.

/// Decrementing usage example:
foreach(var i in A.Range(10,0))
{
    DoSomething(i);
}

// Prints out: 9876543210
/// End of example.

public static class MyList
{
        /// <summary>
        /// Lazily creates a list of numbers that span
        /// a given range. The greater number is
        /// excluded and the smaller is included.
        /// For ex.
        /// 
        /// For Range(0,3) the output is {0,1,2}
        /// For Range(3,0) the output is {2,1,0}
        /// </summary>
        /// <param name="start"></param>
        /// <param name="end"></param>
        /// <returns></returns>
        public static IEnumerable<int> Range(int start, int end)
        {
            if (start < end)
                for (var i = start; i < end; i++)
                {
                    yield return i;
                }
            else
                for (var i = end - 1; i >= start; i--)
                {
                    yield return i;
                }
        }
}