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

namespace BirdyFlash.Lib {

    public static class Extensions {
        public static IEnumerable<string> Split(this string str, int n) {
            if (String.IsNullOrEmpty(str) || n < 1) {
                throw new ArgumentException();
            }

            for (int i = 0; i < str.Length; i += n) {
                yield return str.Substring(i, Math.Min(n, str.Length - i));
            }
        }
    }
}