Esempio n. 1
0
        public static IEnumerable <T> Choice <T>(T[] source, int k)
        {
            IndexList pastIndices = new IndexList();

            for (int i = 0; i < k; i++)
            {
                int nextIndex = Rng.Next(source.Length - i);
                for (int j = 0; j < i; j++)
                {
                    if (nextIndex >= pastIndices[j])
                    {
                        nextIndex++;
                    }
                }
                pastIndices.InsertSorted(nextIndex);
                yield return(source[nextIndex]);
            }
        }