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Partition Elements By C#
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| public static class Extensions { | |
| public static Dictionary<int, IEnumerable<T>> AdjustablePartition<T>(this IEnumerable<T> source, int count) { | |
| var map = new Dictionary<int, IEnumerable<T>>(); | |
| var average = (int)Math.Round(source.Count() / (double)count); | |
| for (int i = 0; i < count; i++) { | |
| if (i == count - 1) { | |
| var skipCount = (i) * average; | |
| var takeCount = source.Count() - skipCount; | |
| map.Add((i + 1), source.Skip(skipCount).Take(takeCount).ToArray()); | |
| } else { | |
| map.Add((i + 1), source.Skip(i * average).Take(average).ToArray()); | |
| } | |
| } | |
| return map; | |
| } | |
| public static Dictionary<int, IEnumerable<T>> JustPartition<T>(this IEnumerable<T> source, int count) { | |
| var sourceCount = source.Count(); | |
| return source.Select((x, i) => new { value = x, index = i }) | |
| .GroupBy(x => x.index / (int)Math.Ceiling(sourceCount / (double)count)) | |
| .Select(x => x.Select(z => z.value)) | |
| .Select((v, i) => new Tuple<int, IEnumerable<T>>(i, v)) | |
| .ToDictionary(v => (v.Item1 + 1), v => v.Item2); | |
| } | |
| } |
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| void Main() { | |
| var sources = Enumerable.Range(1, 10).Select(i => $"Item-{i}").ToArray(); | |
| Console.WriteLine("JustPartition Results"); | |
| foreach (var elm in sources.JustPartition(3)) { | |
| Console.WriteLine($"Group ({elm.Key})"); | |
| Console.WriteLine($"\t\t\t{string.Join("\n\t\t\t", elm.Value)}"); | |
| } | |
| Console.WriteLine("------------------------------------------"); | |
| Console.WriteLine("AdjustablePartition Results"); | |
| foreach (var elm in sources.AdjustablePartition(3)) { | |
| Console.WriteLine($"Group ({elm.Key})"); | |
| Console.WriteLine($"\t\t\t{string.Join("\n\t\t\t", elm.Value)}"); | |
| } | |
| } | |
| /* | |
| JustPartition Results | |
| Group (1) | |
| Item-1 | |
| Item-2 | |
| Item-3 | |
| Item-4 | |
| Group (2) | |
| Item-5 | |
| Item-6 | |
| Item-7 | |
| Item-8 | |
| Group (3) | |
| Item-9 | |
| Item-10 | |
| ------------------------------------------ | |
| AdjustablePartition Results | |
| Group (1) | |
| Item-1 | |
| Item-2 | |
| Item-3 | |
| Group (2) | |
| Item-4 | |
| Item-5 | |
| Item-6 | |
| Group (3) | |
| Item-7 | |
| Item-8 | |
| Item-9 | |
| Item-10 | |
| */ |
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