natix.CompactDS.InvIndexXLBSeq.Rank C# (CSharp) Method

        public int Rank(int symbol, int pos)
        {
            if (pos < 0) {
                return 0;
            }
            var invlist = this.InvIndex[symbol];
            pos = Math.Min (invlist.Count - 1, pos);
            return invlist.Rank1 (pos);
        }