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By which I mean this: Given the input set of numbers: 1,2,3,4,5 becomes "1-5". 1,2,3,5,7,9,10,11,12,14 becomes "1-3, 5, 7, 9-12, 14" This is the best I managed to come up with: [C#] Which feels a little sloppy to me, so the question is, is there somehow more readable and/or elegant solution to this? public static string[] FormatInts(int[] ints) { if (ints == null) throw new ArgumentNullException("ints"); // hey what are you doing? if (ints.Length == 0) return new string[] { "" }; // nothing to process if (ints.Length == 1) return new string[] { ints[0].ToString() }; // nothing to process Array.Sort<int>(ints); // need to sort these lil' babies List<string> values = new List<string>(); int lastNumber = ints[0]; // start with the first number int firstNumber = ints[0]; // same as above for (int i = 1; i < ints.Length; i++) { int current = ints[i]; int difference = (lastNumber - current ); // compute difference between last number and current number if (difference == -1) // the numbers are adjacent { if (firstNumber == 0) // this is the first of the adjacent numbers { firstNumber = lastNumber; } else // we're somehow in the middle or at the end of the adjacent number set { lastNumber = current; continue; } } else { if (firstNumber > 0 && firstNumber != lastNumber) // get ready to print a set of numbers { values.Add(string.Format("{0}-{1}", firstNumber, lastNumber)); firstNumber = 0; // reset } else // print a single value { values.Add(string.Format("{0}", lastNumber)); } } lastNumber = curren

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