{"id":40212,"date":"2017-12-20T15:07:54","date_gmt":"2017-12-20T06:07:54","guid":{"rendered":"https:\/\/www.sejuku.net\/blog\/?p=40212"},"modified":"2024-05-06T11:45:39","modified_gmt":"2024-05-06T02:45:39","slug":"%e3%80%90c%e5%85%a5%e9%96%80%e3%80%91%e9%85%8d%e5%88%97%e3%82%92%e3%82%b3%e3%83%94%e3%83%bc%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e4%b8%80%e9%83%a8%e3%81%ae%e7%af%84%e5%9b%b2%e6%8c%87%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/40212","title":{"rendered":"\u3010C#\u5165\u9580\u3011\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5(\u4e00\u90e8\u306e\u7bc4\u56f2\u6307\u5b9a\u3001\u9ad8\u901f\u30b3\u30d4\u30fc\u3082\u89e3\u8aac)"},"content":{"rendered":"

\u914d\u5217\u306e\u30b3\u30d4\u30fc<\/strong><\/span>\u3063\u3066\u4f7f\u3063\u3066\u3044\u307e\u3059\u304b\uff1f<\/p>\n

C#\u306e\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u306f\u5024\u306e\u30b3\u30d4\u30fc<\/strong><\/span>\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc<\/strong><\/span>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u307e\u305f\u3001\u5024\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3082\u3044\u304f\u3064\u304b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u3064\u3044\u3066<\/p>\n

\u30fb\u5024\u306e\u30b3\u30d4\u30fc\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc<\/strong><\/span>
\n\u30fbArray.Copy\u3067\u5024\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/strong><\/span><\/p>\n

\u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001<\/p>\n

\u30fbBuffer.BlockCopy\u3092\u4f7f\u3046\u65b9\u6cd5<\/strong><\/span>
\n\u30fbSkip\u3068Take\u3092\u4f7f\u3046\u65b9\u6cd5<\/strong><\/span>
\n\u30fb\u9ad8\u901f\u3067\u30b3\u30d4\u30fc\u3059\u308b\u305f\u3081\u306e\u901f\u5ea6\u6bd4\u8f03<\/strong><\/span>
\n\u30fb\u53c2\u7167\u306e\u307f\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/strong><\/span><\/p>\n

\u306a\u3069\u5fdc\u7528\u7684\u306a\u5185\u5bb9\u306b\u3064\u3044\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u4eca\u56de\u306f\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u3064\u3044\u3066\u3001\u4f7f\u3044\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<\/p>\n

\u5024\u306e\u30b3\u30d4\u30fc\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc<\/h2>\n

int\u578b\u306e\u3088\u3046\u306b\u30af\u30e9\u30b9\u578b\u306a\u3069\u3068\u9055\u3044\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u305f\u305a\u3001\u5024\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u578b\u306e\u3053\u3068\u3092\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b<\/strong><\/span>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306b\u5bfe\u3057\u3066\u914d\u5217\u306f\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3061\u3001\u30af\u30e9\u30b9\u578b<\/strong><\/span>\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30af\u30e9\u30b9\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u300c=\u300d\u8a18\u53f7\u3092\u4f7f\u3063\u3066\u30b3\u30d4\u30fc\u3092\u3057\u3066\u3082\u3001\u8981\u7d20\u306e\u5024\u306f\u30b3\u30d4\u30fc\u3055\u308c\u305a\u306b\u3001\u53c2\u7167\u306e\u307f\u30b3\u30d4\u30fc<\/strong><\/span>\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u3092\u30b7\u30e3\u30ed\u30fc\u30b3\u30d4\u30fc(sharrow copy)<\/strong><\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001\u8981\u7d20\u306e\u5024\u3082\u53c2\u7167\u578b\u306e\u69cb\u9020\u3082\u542b\u3081\u3066\u30b3\u30d4\u30fc<\/strong><\/span>\u3059\u308b\u3053\u3068\u3092\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc(deep copy)<\/strong><\/span>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n

C#\u3067\u306f\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\u3092\u884c\u3046\u305f\u3081\u306b\u3001\u30e1\u30bd\u30c3\u30c9\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\uff01<\/p>\n

Array.Copy\u3067\u5024\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/h2>\n

\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u5834\u5408\u306b\u306fArray.Copy<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n

\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n

public static void Copy(\r\n    Array sourceArray,\r\n    int sourceIndex,\r\n    Array destinationArray,\r\n    int destinationIndex,\r\n    int length\r\n)<\/pre>\n
\u5f15\u6570sourceArray\u306f\u3001\u30b3\u30d4\u30fc\u5143\u306e\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3057\u3066\u3044\u308bArray\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u5f15\u6570sourceIndex\u306f\u3001\u30b3\u30d4\u30fc\u306e\u64cd\u4f5c\u306e\u958b\u59cb\u4f4d\u7f6e\u3068\u306a\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u5f15\u6570destinationArray\u306f\u3001\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308bArray\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u5f15\u6570destinationIndex\u306f\u3001\u30c7\u30fc\u30bf\u306e\u683c\u7d0d\u3092\u958b\u59cb\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u5f15\u6570length\u306f\u3001\u30b3\u30d4\u30fc\u3059\u308b\u8981\u7d20\u306e\u6570\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u305d\u308c\u3067\u306f\u3001\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
1\u6b21\u5143\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/h3>\n
1\u6b21\u5143\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n
using System;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      char[] src = {'a', 'b', 'c'};\r\n      char[] dst = new char[src.Length];\r\n      \r\n      Array.Copy(src, dst, src.Length);\r\n      \r\n      Console.WriteLine("[{0}]", string.Join(", ", dst));\r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[a, b, c]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Length<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3057\u3001Array.Copy\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u6307\u5b9a\u3057\u3066\u30b3\u30d4\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
2\u6b21\u5143\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/h3>\n
2\u6b21\u5143\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n
using System;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      char[,] src = {{'a', 'b', 'c'}, {'d', 'e', 'f'}};\r\n      char[,] dst = new char[src.GetLength(0), src.GetLength(1)];\r\n      \r\n      Array.Copy(src, dst, src.Length);\r\n      \r\n      Console.Write("[");\r\n      for(int i = 0; i < 2; i++) {\r\n        Console.Write("[");\r\n        for(int j = 0; j < 3; j++) {\r\n          Console.Write(dst[i,j]);\r\n          Console.Write(", ");\r\n        }\r\n        Console.Write("], ");\r\n      }\r\n      Console.Write("]");\r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[[a, b, c, ], [d, e, f, ], ]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001\u307e\u305aGetLength<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u305d\u308c\u305e\u308c\u306e1\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3057\u30012\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u3057\u3066\u3001Array.Copy\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30b3\u30d4\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u4e00\u90e8\u306e\u7bc4\u56f2\u3092\u6307\u5b9a\u3057\u3066\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/h3>\n
Array.Copy\u30e1\u30bd\u30c3\u30c9\u306f\u7bc4\u56f2\u3092\u6307\u5b9a\u3057\u3066\u914d\u5217\u306e\u4e00\u90e8\u3092\u30b3\u30d4\u30fc<\/strong><\/span>\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
using System;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      char[] src = {'a', 'b', 'c'};\r\n      char[] dst = new char[src.Length - 1];\r\n      \r\n      Array.Copy(src, 1, dst, 0, src.Length - 1);\r\n      \r\n      Console.WriteLine("[{0}]", string.Join(", ", dst));\r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[b, c]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Array.Copy\u30e1\u30bd\u30c3\u30c9\u306e\u7b2c2\u5f15\u6570\u306b1\u3092\u6307\u5b9a\u3057\u3066\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u306e1\u304b\u3089\u3042\u3068\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3088\u3046\u306b\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u7b2c4\u5f15\u6570\u3067\u30b3\u30d4\u30fc\u5148\u306e\u4f4d\u7f6e\u3092\u6307\u5b9a\u3057\u3001\u7b2c5\u5f15\u6570\u3067\u8981\u7d20\u306e\u6570\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u4ed6\u306e\u30b3\u30d4\u30fc\u65b9\u6cd5<\/h2>\n
\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u306b\u306f\u3001Array.Copy\u30e1\u30bd\u30c3\u30c9\u4ee5\u5916\u306b\u3082Buffer.BlockCopy<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u65b9\u6cd5\u3084Skip<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3068Take<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
Buffer.BlockCopy\u3092\u4f7f\u3046\u65b9\u6cd5<\/h3>\n
Buffer.BlockCopy\u30e1\u30bd\u30c3\u30c9\u306f\u8907\u6570\u306e\u914d\u5217\u3092\u7d50\u5408<\/strong><\/span>\u3059\u308b\u5834\u5408\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n
\u30b3\u30d4\u30fc\u306e\u5834\u5408\u3082\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
using System;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      char[] src = {'a', 'b', 'c'};\r\n      char[] dst = new char[src.Length];\r\n      \r\n      \/\/ \u578b\u306e\u30b5\u30a4\u30ba\u3092\u53d6\u5f97\r\n      int size = System.Runtime.InteropServices.Marshal.SizeOf(src.GetType().GetElementType());\r\n      \r\n      \/\/ Buffer.BlockCopy\u3067\u30b3\u30d4\u30fc\r\n      \/\/ UTF-8\u3067\u306f1\u6587\u5b57\u5f53\u305f\u308a2\u30d0\u30a4\u30c8\r\n      Buffer.BlockCopy(src, 0, dst, 0, src.Length * size * 2);\r\n      \r\n      Console.WriteLine("[{0}]", string.Join(", ", dst));\r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[a, b, c]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Buffer.BlockCopy\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
Buffer.BlockCopy\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3084\u8981\u7d20\u306e\u6570\u3092\u6307\u5b9a\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093<\/strong><\/span>\u3002<\/p>\n
\u4f4d\u7f6e\u306f\u30aa\u30d5\u30bb\u30c3\u30c8\u306e\u30d0\u30a4\u30c8\u6570\u3067\u6307\u5b9a<\/strong><\/span>\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u307e\u305f\u30b3\u30d4\u30fc\u3059\u308b\u30d0\u30c3\u30d5\u30a1\u6570\u3092\u6307\u5b9a<\/strong><\/span>\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u4f7f\u7528\u3057\u3066\u3044\u308b\u6587\u5b57\u30b3\u30fc\u30c9\u306b\u3088\u3063\u3066\u306f\u30011\u6587\u5b57\u3042\u305f\u308a\u306e\u30d0\u30a4\u30c8\u6570\u304c\u5909\u308f\u3063\u3066\u304d\u307e\u3059<\/strong><\/span>\u306e\u3067\u3001\u6ce8\u610f\u3057\u3066\u6307\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n
Skip\u3068Take\u3092\u4f7f\u3046\u65b9\u6cd5<\/h3>\n
LINQ\u304c\u4f7f\u3048\u308b\u306e\u3067\u3042\u308c\u3070\u3001Enumerable.Skip<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3068Enumerable.Take<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
Skip\u30e1\u30bd\u30c3\u30c9\u3067\u6307\u5b9a\u3057\u305f\u8981\u7d20\u307e\u3067\u30b9\u30ad\u30c3\u30d7\u3057\u3066\u3001Take\u30e1\u30bd\u30c3\u30c9\u3067\u6307\u5b9a\u3057\u305f\u6570\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
using System;\r\nusing System.Linq;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      char[] src = {'a', 'b', 'c'};\r\n      char[] dst = src.Skip(0).Take(3).ToArray();     \r\n      \r\n      Console.WriteLine("[{0}]", string.Join(", ", dst));\r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[a, b, c]<\/pre>\n
\u9ad8\u901f\u3067\u30b3\u30d4\u30fc\u3059\u308b\u305f\u3081\u306e\u901f\u5ea6\u6bd4\u8f03<\/h2>\n
\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u3064\u3044\u3066\u3001\u3053\u3053\u307e\u3067\uff13\u3064\u306e\u65b9\u6cd5\u3092\u304a\u4f1d\u3048\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u305d\u308c\u3067\u306f\u3001\u3069\u306e\u65b9\u6cd5\u304c\u51e6\u7406\u901f\u5ea6\u304c\u901f\u304f\u3066\u9ad8\u901f\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u901f\u5ea6\u306e\u8a08\u6e2c\u306b\u306fStopwatch<\/strong><\/span>\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n
using System;\r\nusing System.Diagnostics;\r\nusing System.Linq;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      Stopwatch sw = new Stopwatch();\r\n      long nums = 1000000;\r\n      \r\n      char[] src = {'a', 'b', 'c'};\r\n      \r\n      sw.Start();\r\n      for(int i = 0; i < nums; i++) {\r\n        char[] dst = new char[src.Length];\r\n        Array.Copy(src, dst, src.Length);\r\n      }\r\n      sw.Stop();\r\n      Console.WriteLine("Array.Copy\u3067\u306f{0}\u30df\u30ea\u79d2", sw.Elapsed.TotalMilliseconds);\r\n      \r\n      int size = System.Runtime.InteropServices.Marshal.SizeOf(src.GetType().GetElementType());\r\n      sw.Start();\r\n      for(int i = 0; i < nums; i++) {\r\n        char[] dst = new char[src.Length];\r\n        Buffer.BlockCopy(src, 0, dst, 0, src.Length * size * 2);\r\n      }\r\n      sw.Stop();\r\n      Console.WriteLine("Buffer.BlockCopy\u3067\u306f{0}\u30df\u30ea\u79d2", sw.Elapsed.TotalMilliseconds);\r\n      \r\n      sw.Start();\r\n      for(int i = 0; i < nums; i++) {\r\n        char[] dst = src.Skip(0).Take(3).ToArray();\r\n      }\r\n      sw.Stop();\r\n      Console.WriteLine("Skip.Take\u3067\u306f{0}\u30df\u30ea\u79d2", sw.Elapsed.TotalMilliseconds);\r\n      \r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Array.Copy\u3067\u306f47.6585\u30df\u30ea\u79d2\r\nBuffer.BlockCopy\u3067\u306f84.4946\u30df\u30ea\u79d2\r\nSkip.Take\u3067\u306f213.8613\u30df\u30ea\u79d2<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u65b9\u6cd5\u3092100\u4e07\u56de\u7e70\u308a\u8fd4\u3059\u306e\u306b\u304b\u304b\u3063\u305f\u6642\u9593\u3092Diagnostics.Stopwatch\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u8a08\u6e2c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
Array.Copy\u30e1\u30bd\u30c3\u30c9\u306fBuffer.BlockCopy\u306b\u6bd4\u3079\u3066\u82e5\u5e72\u901f\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n
LINQ\u306eSkip<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3068Take<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u4ed6\u306e2\u3064\u306b\u6bd4\u3079\u3066\u3001\u660e\u3089\u304b\u306b\u9045\u3044<\/strong><\/span>\u7d50\u679c\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u53c2\u7167\u306e\u307f\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5<\/h2>\n
\u300c=\u300d\u8a18\u53f7\u3092\u4f7f\u3063\u3066\u30b3\u30d4\u30fc\u3059\u308b\u3068\u53c2\u7167\u306e\u307f\u306e\u30b3\u30d4\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u53c2\u7167\u306e\u307f\u306e\u30b3\u30d4\u30fc\u3092\u884c\u3046\u3068\u3001\u30b3\u30d4\u30fc\u5143\u306e\u8981\u7d20\u306e\u5024\u304c\u5909\u308f\u3063\u305f\u5834\u5408\u306b\u3001\u30b3\u30d4\u30fc\u5148\u306e\u8981\u7d20\u306e\u5024\u3082\u5909\u308f\u308a\u307e\u3059<\/strong><\/span>\u3002<\/p>\n
\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001Array.Copy\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u3067\u5024\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc\u3092\u884c\u3046\u3068\u3001\u30b3\u30d4\u30fc\u5148\u306e\u8981\u7d20\u306e\u5024\u304c\u5909\u308f\u3063\u3066\u3082\u3001\u30b3\u30d4\u30fc\u5148\u306e\u8981\u7d20\u306e\u5024\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
using System;\r\n\r\nnamespace ArrayCopy\r\n{\r\n  class ArrayCopy\r\n  {\r\n    static void Main()\r\n    {\r\n      char[] src = {'a', 'b', 'c'};\r\n      char[] dst = new char[src.Length];\r\n      \r\n      \/\/ \u5024\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc\r\n      Array.Copy(src, dst, src.Length);\r\n      src[1] = 'B';\r\n      Console.WriteLine("\u5024\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc: [{0}]", string.Join(", ", dst));\r\n      \r\n      \/\/ \u53c2\u7167\u306e\u307f\u306e\u30b3\u30d4\u30fc\r\n      src[1] = 'b';\r\n      dst = src;\r\n      src[1] = 'B';\r\n      Console.WriteLine("\u53c2\u7167\u306e\u307f\u306e\u30b3\u30d4\u30fc: [{0}]", string.Join(", ", dst));\r\n      \r\n      Console.ReadKey();\r\n    }\r\n  }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
\u5024\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc: [a, b, c]\r\n\u53c2\u7167\u306e\u307f\u306e\u30b3\u30d4\u30fc: [a, B, c]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001Array.Copy\u30e1\u30bd\u30c3\u30c9\u3067\u30b3\u30d4\u30fc\u3057\u305f\u5834\u5408\u3001\u5143\u306e\u8981\u7d20\u306e\u5024\u304c\u5909\u308f\u3063\u3066\u3082\u30b3\u30d4\u30fc\u5148\u306e\u5024\u306f\u5909\u308f\u3063\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n
\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001\u300c=\u300d\u8a18\u53f7\u3067\u30b3\u30d4\u30fc\u3057\u305f\u5834\u5408\u306f\u3001\u30b3\u30d4\u30fc\u5148\u306e\u5024\u307e\u3067\u5909\u308f\u3063\u3066\u3044\u307e\u3059<\/strong><\/span>\u3002<\/p>\n
\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u3053\u3053\u3067\u306f\u3001\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5\u3068\u3057\u3066\u3001Array.Copy<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u65b9\u6cd5\u3001Buffer.BlockCopy<\/strong><\/span>\u3092\u4f7f\u3046\u65b9\u6cd5\u3001Skip<\/strong><\/span>\u3068Take<\/strong><\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u65b9\u6cd5\u306e\uff13\u3064\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u305d\u308c\u305e\u308c\u4f7f\u3044\u65b9\u3084\u51e6\u7406\u6027\u80fd\u304c\u7570\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u76ee\u7684\u306b\u5408\u308f\u305b\u3066\u4f7f\u3044\u5206\u3051<\/strong><\/span>\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u307e\u305f\u3001\u300c=\u300d\u8a18\u53f7\u3067\u30b3\u30d4\u30fc\u3059\u308b\u3068\u3001\u53c2\u7167\u306e\u307f\u306e\u30b3\u30d4\u30fc\u3067\u5024\u304c\u610f\u56f3\u305b\u305a\u306b\u5909\u308f\u308b<\/strong><\/span>\u53ef\u80fd\u6027\u3082\u3042\u308b\u306e\u3067\u3001\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u3053\u306e\u8a18\u4e8b\u3092\u4f55\u5ea6\u3082\u53c2\u8003\u306b\u3057\u3066\u4e0b\u3055\u3044\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u914d\u5217\u306e\u30b3\u30d4\u30fc\u3063\u3066\u4f7f\u3063\u3066\u3044\u307e\u3059\u304b\uff1f C#\u306e\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u306f\u5024\u306e\u30b3\u30d4\u30fc\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc\u304c\u3042\u308a\u307e\u3059\u3002 \u307e\u305f\u3001\u5024\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3082\u3044\u304f\u3064\u304b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u914d\u5217\u306e\u30b3\u30d4\u30fc\u306b\u3064\u3044\u3066 \u30fb\u5024\u306e\u30b3\u30d4\u30fc\u3068\u53c2\u7167\u306e\u30b3\u30d4\u30fc \u30fb […]<\/p>\n","protected":false},"author":4,"featured_media":40340,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2334],"tags":[71],"class_list":["post-40212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-sharp-study","tag-c"],"acf":[],"yoast_head":"\n\u3010C#\u5165\u9580\u3011\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5(\u4e00\u90e8\u306e\u7bc4\u56f2\u6307\u5b9a\u3001\u9ad8\u901f\u30b3\u30d4\u30fc\u3082\u89e3\u8aac) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c \u3010C#\u5165\u9580\u3011\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5(\u4e00\u90e8\u306e\u7bc4\u56f2\u6307\u5b9a\u3001\u9ad8\u901f\u30b3\u30d4\u30fc\u3082\u89e3\u8aac) \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sejuku.net\/blog\/40212\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010C#\u5165\u9580\u3011\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5(\u4e00\u90e8\u306e\u7bc4\u56f2\u6307\u5b9a\u3001\u9ad8\u901f\u30b3\u30d4\u30fc\u3082\u89e3\u8aac) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c \u3010C#\u5165\u9580\u3011\u914d\u5217\u3092\u30b3\u30d4\u30fc\u3059\u308b\u65b9\u6cd5(\u4e00\u90e8\u306e\u7bc4\u56f2\u6307\u5b9a\u3001\u9ad8\u901f\u30b3\u30d4\u30fc\u3082\u89e3\u8aac) 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