\d 效率低于 [0-9]
我昨天对有人在正则表达式中使用 [0123456789] 而不是 [0-9] 或 \d 的答案发表了评论。我说过使用范围或数字说明符可能比字符集更有效。
我决定今天测试一下，我惊讶地发现（至少在 c# regex 引擎中）\d 似乎比其他两个似乎没有太大差异的效率低。这是我的测试输出超过 10000 个随机字符串的 1000 个随机字符，其中 5077 实际上包含一个数字：
Regex \d took 00:00:00.2141226 result: 5077/10000
Regex [0-9] took 00:00:00.1357972 result: 5077/10000 63.42 % of first
Regex [0123456789] took 00:00:00.1388997 result: 5077/10000 64.87 % of first
有两个原因让我感到惊讶，如果有人能解释一下，我会很感兴趣：
我原以为范围会比集合更有效地实施。我不明白为什么 \d 比 [0-9] 差。除了 [0-9] 的简写之外，\d 还有更多吗？
这是测试代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Text.RegularExpressions;
namespace SO_RegexPerformance
{
class Program
{
static void Main(string[] args)
{
var rand = new Random(1234);
var strings = new List<string>();
//10K random strings
for (var i = 0; i < 10000; i++)
{
//generate random string
var sb = new StringBuilder();
for (var c = 0; c < 1000; c++)
{
//add a-z randomly
sb.Append((char)('a' + rand.Next(26)));
}
//in roughly 50% of them, put a digit
if (rand.Next(2) == 0)
{
//replace 1 char with a digit 0-9
sb[rand.Next(sb.Length)] = (char)('0' + rand.Next(10));
}
strings.Add(sb.ToString());
}
var baseTime = testPerfomance(strings, @"\d");
Console.WriteLine();
var testTime = testPerfomance(strings, "[0-9]");
Console.WriteLine(" {0:P2} of first", testTime.TotalMilliseconds / baseTime.TotalMilliseconds);
testTime = testPerfomance(strings, "[0123456789]");
Console.WriteLine(" {0:P2} of first", testTime.TotalMilliseconds / baseTime.TotalMilliseconds);
}
private static TimeSpan testPerfomance(List<string> strings, string regex)
{
var sw = new Stopwatch();
int successes = 0;
var rex = new Regex(regex);
sw.Start();
foreach (var str in strings)
{
if (rex.Match(str).Success)
{
successes++;
}
}
sw.Stop();
Console.Write("Regex {0,-12} took {1} result: {2}/{3}", regex, sw.Elapsed, successes, strings.Count);
return sw.Elapsed;
}
}
}
可能
\d 处理语言环境。例如，希伯来语使用字母表示数字。
这是一个有趣的问题，正是因为
\d 在不同语言中的意思不同。在 Java 中，例如 \d does indeed match 0-9 only
@Barmar 希伯来语通常不使用字母表示数字，而是使用相同的拉丁数字数字 [0-9]。字母可以代替数字，但这是一种罕见的用途，并保留用于特殊术语。我不希望正则表达式解析器匹配 כ"ג יורדי סירה （用 כ"ג 代替 23）。此外，从 Sina Iravanian 的回答中可以看出，希伯来字母不会显示为 \d 的有效匹配项。
将 Weston 的代码移植到 Java 产生： -- Regex \d 占用 00:00:00.043922 结果：4912/10000 -- Regex [0-9] 占用 00:00:00.073658 结果：4912/10000 167% of first -- Regex [ 0123456789] 00:00:00.085799 结果：4912/10000 195% 的第一个
d
dakab
\d 检查所有 Unicode 数字，而 [0-9] 仅限于这 10 个字符。例如，Persian 位、۱۲۳۴۵۶۷۸۹ 是与 \d 匹配但与 [0-9] 不匹配的 Unicode 数字示例。
您可以使用以下代码生成所有此类字符的列表：
var sb = new StringBuilder();
for(UInt16 i = 0; i < UInt16.MaxValue; i++)
{
string str = Convert.ToChar(i).ToString();
if (Regex.IsMatch(str, @"\d"))
sb.Append(str);
}
Console.WriteLine(sb.ToString());
生成：
0123456789 ٠١٢٣٤٥٦٧٨٩۰۱۲۳۴۵۶۷۸۹߀߁߂߃߄߅߆߇߈߉०१२३४५६७८ ९୦୧୨୩୪୫୬୭୮୯᠐᠑᠒᠓᠔᠕᠖᠗᠘᠙᥆᥇᥈᥉᥊᥋᥌᥍᥎᥏᧑᧒᧓᧔᧕᧖᧗᧘᧙᧑᧒᧓᧔᧕᧖᧗᧘᧙᭐᭑᭒᭓᭔᭕᭖᭗᭘᭙᮰᮱᮲᮳᮴᮵᮶᮷᮸᮹᱀᱁᱂᱃᱄᱅᱆᱇᱈᱉᱐᱑᱒᱓᱔᱕᱖᱗᱘᱙꘠꘡꘢꘣꘤꘥꘦꘧꘨꘩꣐꣑꣒꣓꣔꣕꣖꣗꣘꣙꤀꤁꤂꤃꤄꤅꤆꤇꤈꤉꩐꩑꩒꩓꩔꩕꩖꩗꩘꩙０１２３４５６７８９
以下是非 0-9 的更完整数字列表：fileformat.info/info/unicode/category/Nd/list.htm
@weston Unicode 有 17 个平面，每个平面 16 位。最重要的字符在基本平面，但一些特殊字符，主要是中文，在补充平面。在 C# 中处理这些有点烦人。
@RobertMcKee：Nitpick：完整的 unicode 字符集实际上是 21 位（17 个平面，每个平面 16 位）。但是当然 21 位数据类型是不切实际的，所以如果您使用 2 的幂数据类型，那么您确实需要 32 位。
根据 this Wikipedia article，Unicode 联盟声明 1,114,112 个代码点（0 到 0x010FFFF）的限制永远不会改变。它链接到 unicode.org，但我没有在那里找到该声明（我可能只是错过了它）。
它永远不会改变——直到他们需要改变它。
w
weston
感谢 ByteBlast 在文档中注意到这一点。只需更改正则表达式构造函数：
var rex = new Regex(regex, RegexOptions.ECMAScript);
给出新的时间：
Regex \d took 00:00:00.1355787 result: 5077/10000
Regex [0-9] took 00:00:00.1360403 result: 5077/10000 100.34 % of first
Regex [0123456789] took 00:00:00.1362112 result: 5077/10000 100.47 % of first
RegexOptions.ECMAScript 有什么作用？
来自 Regular Expression Options：“为表达式启用符合 ECMAScript 的行为。”
@0xFE：不完全是。 Unicode 转义在
ECMAScript (\u1234) 中仍然有效。它“只是”改变含义的速记字符类（如 \d）和消失的 Unicode 属性/脚本速记（如 \p{N}）。
这不是对“为什么”部分的回答。这是一个“解决症状”的答案。还是有价值的信息。
通常，Regrex 支持 unicode 匹配。但 ECMAScript 没有。因此，在使用 RegexOptions.ECMAScript 时，它只匹配 ascii，即 0-9。
C
Community
从 Does “\d” in regex mean a digit?：
[0-9] 不等于 \d。 [0-9] 仅匹配 0123456789 个字符，而 \d 匹配 [0-9] 和其他数字字符，例如东方阿拉伯数字 ٠١٢٣٤٥٦٧٨٩
根据：msdn.microsoft.com/en-us/library/20bw873z.aspx
If ECMAScript-compliant behavior is specified, \d is equivalent to [0-9].
呵呵，我错了还是链接中的这句话正好相反。 “\d 匹配任何十进制数字。它相当于 \p{Nd} 正则表达式模式，它包括标准的十进制数字 0-9 以及许多其他字符集的十进制数字。”
@ByteBlast 谢谢，使用构造函数：
var rex = new Regex(regex, RegexOptions.ECMAScript); 使它们在性能方面几乎无法区分。
哦，无论如何，谢谢大家。这个问题对我来说是一个很好的学习。
请不要“只是复制”其他问题的答案。如果问题是重复的，请将其标记为这样。
S
Sebastian
除了 Sina Iravianian 中的 top answer，这里是他的代码的 .NET 4.5 版本（因为只有那个版本支持 UTF16 输出，参见前三行），它使用了全范围的 Unicode 代码点。由于缺乏对高级 Unicode 平面的适当支持，许多人没有意识到总是检查并包含高级 Unicode 平面。尽管如此，它们有时确实包含一些重要的字符。
更新
由于 \d 不支持正则表达式中的非 BMP 字符（感谢 xanatos），这里有一个使用 Unicode 字符数据库的版本
更新 2
感谢 damilola-adegunwa，我添加了对 UCD 的缺失引用（通过 NuGet 包 UnicodeInformation）。还更新到最新的 .NET 核心版本和 UTF-8 输出。
// reference https://www.nuget.org/packages/UnicodeInformation/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Globalization;
using System.Unicode;
public class Program
{
public static void Main()
{
var unicodeEncoding = new UTF8Encoding(false);
Console.OutputEncoding = unicodeEncoding;
var numberCategories = new HashSet<UnicodeCategory>(new []{
UnicodeCategory.DecimalDigitNumber,
UnicodeCategory.LetterNumber,
UnicodeCategory.OtherNumber
});
var numberLikeChars =
from codePoint in Enumerable.Range(0, 0x10ffff)
where codePoint > UInt16.MaxValue
|| (!char.IsLowSurrogate((char) codePoint) && !char.IsHighSurrogate((char) codePoint))
let charInfo = UnicodeInfo.GetCharInfo(codePoint)
where numberCategories.Contains(charInfo.Category)
let codePointString = char.ConvertFromUtf32(codePoint)
select (codePoint, charInfo, codePointString);
foreach (var (codePoint, charInfo, codePointString) in numberLikeChars)
{
Console.Write("U+{0} ", codePoint.ToString("X6"));
Console.Write(" {0,-4}", codePointString);
Console.Write(" {0,-40}", charInfo.Name ?? charInfo.OldName);
Console.Write(" {0,-6}", CharUnicodeInfo.GetNumericValue(codePointString, 0));
Console.Write(" {0,-6}", CharUnicodeInfo.GetDigitValue(codePointString, 0));
Console.Write(" {0,-6}", CharUnicodeInfo.GetDecimalDigitValue(codePointString, 0));
Console.WriteLine(" {0}", charInfo.Category);
}
}
}
产生以下输出：
U+000030 0 DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000031 1 DIGIT ONE 1 1 1 DecimalDigitNumber
U+000032 2 DIGIT TWO 2 2 2 DecimalDigitNumber
U+000033 3 DIGIT THREE 3 3 3 DecimalDigitNumber
U+000034 4 DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000035 5 DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000036 6 DIGIT SIX 6 6 6 DecimalDigitNumber
U+000037 7 DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000038 8 DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000039 9 DIGIT NINE 9 9 9 DecimalDigitNumber
U+0000B2 ² SUPERSCRIPT TWO 2 2 -1 OtherNumber
U+0000B3 ³ SUPERSCRIPT THREE 3 3 -1 OtherNumber
U+0000B9 ¹ SUPERSCRIPT ONE 1 1 -1 OtherNumber
U+0000BC ¼ VULGAR FRACTION ONE QUARTER 0.25 -1 -1 OtherNumber
U+0000BD ½ VULGAR FRACTION ONE HALF 0.5 -1 -1 OtherNumber
U+0000BE ¾ VULGAR FRACTION THREE QUARTERS 0.75 -1 -1 OtherNumber
U+000660 ٠ ARABIC-INDIC DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000661 ١ ARABIC-INDIC DIGIT ONE 1 1 1 DecimalDigitNumber
U+000662 ٢ ARABIC-INDIC DIGIT TWO 2 2 2 DecimalDigitNumber
U+000663 ٣ ARABIC-INDIC DIGIT THREE 3 3 3 DecimalDigitNumber
U+000664 ٤ ARABIC-INDIC DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000665 ٥ ARABIC-INDIC DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000666 ٦ ARABIC-INDIC DIGIT SIX 6 6 6 DecimalDigitNumber
U+000667 ٧ ARABIC-INDIC DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000668 ٨ ARABIC-INDIC DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000669 ٩ ARABIC-INDIC DIGIT NINE 9 9 9 DecimalDigitNumber
U+0006F0 ۰ EXTENDED ARABIC-INDIC DIGIT ZERO 0 0 0 DecimalDigitNumber
U+0006F1 ۱ EXTENDED ARABIC-INDIC DIGIT ONE 1 1 1 DecimalDigitNumber
U+0006F2 ۲ EXTENDED ARABIC-INDIC DIGIT TWO 2 2 2 DecimalDigitNumber
U+0006F3 ۳ EXTENDED ARABIC-INDIC DIGIT THREE 3 3 3 DecimalDigitNumber
U+0006F4 ۴ EXTENDED ARABIC-INDIC DIGIT FOUR 4 4 4 DecimalDigitNumber
U+0006F5 ۵ EXTENDED ARABIC-INDIC DIGIT FIVE 5 5 5 DecimalDigitNumber
U+0006F6 ۶ EXTENDED ARABIC-INDIC DIGIT SIX 6 6 6 DecimalDigitNumber
U+0006F7 ۷ EXTENDED ARABIC-INDIC DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+0006F8 ۸ EXTENDED ARABIC-INDIC DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+0006F9 ۹ EXTENDED ARABIC-INDIC DIGIT NINE 9 9 9 DecimalDigitNumber
U+0007C0 ߀ NKO DIGIT ZERO 0 0 0 DecimalDigitNumber
U+0007C1 ߁ NKO DIGIT ONE 1 1 1 DecimalDigitNumber
U+0007C2 ߂ NKO DIGIT TWO 2 2 2 DecimalDigitNumber
U+0007C3 ߃ NKO DIGIT THREE 3 3 3 DecimalDigitNumber
U+0007C4 ߄ NKO DIGIT FOUR 4 4 4 DecimalDigitNumber
U+0007C5 ߅ NKO DIGIT FIVE 5 5 5 DecimalDigitNumber
U+0007C6 ߆ NKO DIGIT SIX 6 6 6 DecimalDigitNumber
U+0007C7 ߇ NKO DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+0007C8 ߈ NKO DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+0007C9 ߉ NKO DIGIT NINE 9 9 9 DecimalDigitNumber
U+000966 ० DEVANAGARI DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000967 १ DEVANAGARI DIGIT ONE 1 1 1 DecimalDigitNumber
U+000968 २ DEVANAGARI DIGIT TWO 2 2 2 DecimalDigitNumber
U+000969 ३ DEVANAGARI DIGIT THREE 3 3 3 DecimalDigitNumber
U+00096A ४ DEVANAGARI DIGIT FOUR 4 4 4 DecimalDigitNumber
U+00096B ५ DEVANAGARI DIGIT FIVE 5 5 5 DecimalDigitNumber
U+00096C ६ DEVANAGARI DIGIT SIX 6 6 6 DecimalDigitNumber
U+00096D ७ DEVANAGARI DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+00096E ८ DEVANAGARI DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+00096F ९ DEVANAGARI DIGIT NINE 9 9 9 DecimalDigitNumber
U+0009E6 ০ BENGALI DIGIT ZERO 0 0 0 DecimalDigitNumber
U+0009E7 ১ BENGALI DIGIT ONE 1 1 1 DecimalDigitNumber
U+0009E8 ২ BENGALI DIGIT TWO 2 2 2 DecimalDigitNumber
U+0009E9 ৩ BENGALI DIGIT THREE 3 3 3 DecimalDigitNumber
U+0009EA ৪ BENGALI DIGIT FOUR 4 4 4 DecimalDigitNumber
U+0009EB ৫ BENGALI DIGIT FIVE 5 5 5 DecimalDigitNumber
U+0009EC ৬ BENGALI DIGIT SIX 6 6 6 DecimalDigitNumber
U+0009ED ৭ BENGALI DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+0009EE ৮ BENGALI DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+0009EF ৯ BENGALI DIGIT NINE 9 9 9 DecimalDigitNumber
U+0009F4 ৴ BENGALI CURRENCY NUMERATOR ONE 0.0625 -1 -1 OtherNumber
U+0009F5 ৵ BENGALI CURRENCY NUMERATOR TWO 0.125 -1 -1 OtherNumber
U+0009F6 ৶ BENGALI CURRENCY NUMERATOR THREE 0.1875 -1 -1 OtherNumber
U+0009F7 ৷ BENGALI CURRENCY NUMERATOR FOUR 0.25 -1 -1 OtherNumber
U+0009F8 ৸ BENGALI CURRENCY NUMERATOR ONE LESS THAN THE DENOMINATOR 0.75 -1 -1 OtherNumber
U+0009F9 ৹ BENGALI CURRENCY DENOMINATOR SIXTEEN 16 -1 -1 OtherNumber
U+000A66 ੦ GURMUKHI DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000A67 ੧ GURMUKHI DIGIT ONE 1 1 1 DecimalDigitNumber
U+000A68 ੨ GURMUKHI DIGIT TWO 2 2 2 DecimalDigitNumber
U+000A69 ੩ GURMUKHI DIGIT THREE 3 3 3 DecimalDigitNumber
U+000A6A ੪ GURMUKHI DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000A6B ੫ GURMUKHI DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000A6C ੬ GURMUKHI DIGIT SIX 6 6 6 DecimalDigitNumber
U+000A6D ੭ GURMUKHI DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000A6E ੮ GURMUKHI DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000A6F ੯ GURMUKHI DIGIT NINE 9 9 9 DecimalDigitNumber
U+000AE6 ૦ GUJARATI DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000AE7 ૧ GUJARATI DIGIT ONE 1 1 1 DecimalDigitNumber
U+000AE8 ૨ GUJARATI DIGIT TWO 2 2 2 DecimalDigitNumber
U+000AE9 ૩ GUJARATI DIGIT THREE 3 3 3 DecimalDigitNumber
U+000AEA ૪ GUJARATI DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000AEB ૫ GUJARATI DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000AEC ૬ GUJARATI DIGIT SIX 6 6 6 DecimalDigitNumber
U+000AED ૭ GUJARATI DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000AEE ૮ GUJARATI DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000AEF ૯ GUJARATI DIGIT NINE 9 9 9 DecimalDigitNumber
U+000B66 ୦ ORIYA DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000B67 ୧ ORIYA DIGIT ONE 1 1 1 DecimalDigitNumber
U+000B68 ୨ ORIYA DIGIT TWO 2 2 2 DecimalDigitNumber
U+000B69 ୩ ORIYA DIGIT THREE 3 3 3 DecimalDigitNumber
U+000B6A ୪ ORIYA DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000B6B ୫ ORIYA DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000B6C ୬ ORIYA DIGIT SIX 6 6 6 DecimalDigitNumber
U+000B6D ୭ ORIYA DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000B6E ୮ ORIYA DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000B6F ୯ ORIYA DIGIT NINE 9 9 9 DecimalDigitNumber
U+000B72 ୲ ORIYA FRACTION ONE QUARTER 0.25 -1 -1 OtherNumber
U+000B73 ୳ ORIYA FRACTION ONE HALF 0.5 -1 -1 OtherNumber
U+000B74 ୴ ORIYA FRACTION THREE QUARTERS 0.75 -1 -1 OtherNumber
U+000B75 ୵ ORIYA FRACTION ONE SIXTEENTH 0.0625 -1 -1 OtherNumber
U+000B76 ୶ ORIYA FRACTION ONE EIGHTH 0.125 -1 -1 OtherNumber
U+000B77 ୷ ORIYA FRACTION THREE SIXTEENTHS 0.1875 -1 -1 OtherNumber
U+000BE6 ௦ TAMIL DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000BE7 ௧ TAMIL DIGIT ONE 1 1 1 DecimalDigitNumber
U+000BE8 ௨ TAMIL DIGIT TWO 2 2 2 DecimalDigitNumber
U+000BE9 ௩ TAMIL DIGIT THREE 3 3 3 DecimalDigitNumber
U+000BEA ௪ TAMIL DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000BEB ௫ TAMIL DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000BEC ௬ TAMIL DIGIT SIX 6 6 6 DecimalDigitNumber
U+000BED ௭ TAMIL DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000BEE ௮ TAMIL DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000BEF ௯ TAMIL DIGIT NINE 9 9 9 DecimalDigitNumber
U+000BF0 ௰ TAMIL NUMBER TEN 10 -1 -1 OtherNumber
U+000BF1 ௱ TAMIL NUMBER ONE HUNDRED 100 -1 -1 OtherNumber
U+000BF2 ௲ TAMIL NUMBER ONE THOUSAND 1000 -1 -1 OtherNumber
U+000C66 ౦ TELUGU DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000C67 ౧ TELUGU DIGIT ONE 1 1 1 DecimalDigitNumber
U+000C68 ౨ TELUGU DIGIT TWO 2 2 2 DecimalDigitNumber
U+000C69 ౩ TELUGU DIGIT THREE 3 3 3 DecimalDigitNumber
U+000C6A ౪ TELUGU DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000C6B ౫ TELUGU DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000C6C ౬ TELUGU DIGIT SIX 6 6 6 DecimalDigitNumber
U+000C6D ౭ TELUGU DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000C6E ౮ TELUGU DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000C6F ౯ TELUGU DIGIT NINE 9 9 9 DecimalDigitNumber
U+000C78 ౸ TELUGU FRACTION DIGIT ZERO FOR ODD POWERS OF FOUR 0 -1 -1 OtherNumber
U+000C79 ౹ TELUGU FRACTION DIGIT ONE FOR ODD POWERS OF FOUR 1 -1 -1 OtherNumber
U+000C7A ౺ TELUGU FRACTION DIGIT TWO FOR ODD POWERS OF FOUR 2 -1 -1 OtherNumber
U+000C7B ౻ TELUGU FRACTION DIGIT THREE FOR ODD POWERS OF FOUR 3 -1 -1 OtherNumber
U+000C7C ౼ TELUGU FRACTION DIGIT ONE FOR EVEN POWERS OF FOUR 1 -1 -1 OtherNumber
U+000C7D ౽ TELUGU FRACTION DIGIT TWO FOR EVEN POWERS OF FOUR 2 -1 -1 OtherNumber
U+000C7E ౾ TELUGU FRACTION DIGIT THREE FOR EVEN POWERS OF FOUR 3 -1 -1 OtherNumber
U+000CE6 ೦ KANNADA DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000CE7 ೧ KANNADA DIGIT ONE 1 1 1 DecimalDigitNumber
U+000CE8 ೨ KANNADA DIGIT TWO 2 2 2 DecimalDigitNumber
U+000CE9 ೩ KANNADA DIGIT THREE 3 3 3 DecimalDigitNumber
U+000CEA ೪ KANNADA DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000CEB ೫ KANNADA DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000CEC ೬ KANNADA DIGIT SIX 6 6 6 DecimalDigitNumber
U+000CED ೭ KANNADA DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000CEE ೮ KANNADA DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000CEF ೯ KANNADA DIGIT NINE 9 9 9 DecimalDigitNumber
U+000D58 ൘ MALAYALAM FRACTION ONE ONE-HUNDRED-AND-SIXTIETH 0.00625 -1 -1 OtherNumber
U+000D59 ൙ MALAYALAM FRACTION ONE FORTIETH 0.025 -1 -1 OtherNumber
U+000D5A ൚ MALAYALAM FRACTION THREE EIGHTIETHS 0.0375 -1 -1 OtherNumber
U+000D5B ൛ MALAYALAM FRACTION ONE TWENTIETH 0.05 -1 -1 OtherNumber
U+000D5C ൜ MALAYALAM FRACTION ONE TENTH 0.1 -1 -1 OtherNumber
U+000D5D ൝ MALAYALAM FRACTION THREE TWENTIETHS 0.15 -1 -1 OtherNumber
U+000D5E ൞ MALAYALAM FRACTION ONE FIFTH 0.2 -1 -1 OtherNumber
U+000D66 ൦ MALAYALAM DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000D67 ൧ MALAYALAM DIGIT ONE 1 1 1 DecimalDigitNumber
U+000D68 ൨ MALAYALAM DIGIT TWO 2 2 2 DecimalDigitNumber
U+000D69 ൩ MALAYALAM DIGIT THREE 3 3 3 DecimalDigitNumber
U+000D6A ൪ MALAYALAM DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000D6B ൫ MALAYALAM DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000D6C ൬ MALAYALAM DIGIT SIX 6 6 6 DecimalDigitNumber
U+000D6D ൭ MALAYALAM DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000D6E ൮ MALAYALAM DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000D6F ൯ MALAYALAM DIGIT NINE 9 9 9 DecimalDigitNumber
U+000D70 ൰ MALAYALAM NUMBER TEN 10 -1 -1 OtherNumber
U+000D71 ൱ MALAYALAM NUMBER ONE HUNDRED 100 -1 -1 OtherNumber
U+000D72 ൲ MALAYALAM NUMBER ONE THOUSAND 1000 -1 -1 OtherNumber
U+000D73 ൳ MALAYALAM FRACTION ONE QUARTER 0.25 -1 -1 OtherNumber
U+000D74 ൴ MALAYALAM FRACTION ONE HALF 0.5 -1 -1 OtherNumber
U+000D75 ൵ MALAYALAM FRACTION THREE QUARTERS 0.75 -1 -1 OtherNumber
U+000D76 ൶ MALAYALAM FRACTION ONE SIXTEENTH 0.0625 -1 -1 OtherNumber
U+000D77 ൷ MALAYALAM FRACTION ONE EIGHTH 0.125 -1 -1 OtherNumber
U+000D78 ൸ MALAYALAM FRACTION THREE SIXTEENTHS 0.1875 -1 -1 OtherNumber
U+000DE6 ෦ SINHALA LITH DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000DE7 ෧ SINHALA LITH DIGIT ONE 1 1 1 DecimalDigitNumber
U+000DE8 ෨ SINHALA LITH DIGIT TWO 2 2 2 DecimalDigitNumber
U+000DE9 ෩ SINHALA LITH DIGIT THREE 3 3 3 DecimalDigitNumber
U+000DEA ෪ SINHALA LITH DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000DEB ෫ SINHALA LITH DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000DEC ෬ SINHALA LITH DIGIT SIX 6 6 6 DecimalDigitNumber
U+000DED ෭ SINHALA LITH DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000DEE ෮ SINHALA LITH DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000DEF ෯ SINHALA LITH DIGIT NINE 9 9 9 DecimalDigitNumber
U+000E50 ๐ THAI DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000E51 ๑ THAI DIGIT ONE 1 1 1 DecimalDigitNumber
U+000E52 ๒ THAI DIGIT TWO 2 2 2 DecimalDigitNumber
U+000E53 ๓ THAI DIGIT THREE 3 3 3 DecimalDigitNumber
U+000E54 ๔ THAI DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000E55 ๕ THAI DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000E56 ๖ THAI DIGIT SIX 6 6 6 DecimalDigitNumber
U+000E57 ๗ THAI DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000E58 ๘ THAI DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000E59 ๙ THAI DIGIT NINE 9 9 9 DecimalDigitNumber
U+000ED0 ໐ LAO DIGIT ZERO 0 0 0 DecimalDigitNumber
U+000ED1 ໑ LAO DIGIT ONE 1 1 1 DecimalDigitNumber
U+000ED2 ໒ LAO DIGIT TWO 2 2 2 DecimalDigitNumber
U+000ED3 ໓ LAO DIGIT THREE 3 3 3 DecimalDigitNumber
U+000ED4 ໔ LAO DIGIT FOUR 4 4 4 DecimalDigitNumber
U+000ED5 ໕ LAO DIGIT FIVE 5 5 5 DecimalDigitNumber
U+000ED6 ໖ LAO DIGIT SIX 6 6 6 DecimalDigitNumber
U+000ED7 ໗ LAO DIGIT SEVEN 7 7 7 DecimalDigitNumber
U+000ED8 ໘ LAO DIGIT EIGHT 8 8 8 DecimalDigitNumber
U+000ED9 ໙ LAO DIGIT NINE 9 9 9 DecimalDigitNumber
...
U+01F10B 🄋 DINGBAT CIRCLED SANS-SERIF DIGIT ZERO 0 -1 -1 OtherNumber
U+01F10C 🄌 DINGBAT NEGATIVE CIRCLED SANS-SERIF DIGIT ZERO 0 -1 -1 OtherNumber
U+01FBF0 🯰 SEGMENTED DIGIT ZERO -1 -1 -1 DecimalDigitNumber
U+01FBF1 🯱 SEGMENTED DIGIT ONE -1 -1 -1 DecimalDigitNumber
U+01FBF2 🯲 SEGMENTED DIGIT TWO -1 -1 -1 DecimalDigitNumber
U+01FBF3 🯳 SEGMENTED DIGIT THREE -1 -1 -1 DecimalDigitNumber
U+01FBF4 🯴 SEGMENTED DIGIT FOUR -1 -1 -1 DecimalDigitNumber
U+01FBF5 🯵 SEGMENTED DIGIT FIVE -1 -1 -1 DecimalDigitNumber
U+01FBF6 🯶 SEGMENTED DIGIT SIX -1 -1 -1 DecimalDigitNumber
U+01FBF7 🯷 SEGMENTED DIGIT SEVEN -1 -1 -1 DecimalDigitNumber
U+01FBF8 🯸 SEGMENTED DIGIT EIGHT -1 -1 -1 DecimalDigitNumber
U+01FBF9 🯹 SEGMENTED DIGIT NINE -1 -1 -1 DecimalDigitNumber
可悲的是 Win32 控制台不显示星体字符
如果我没记错的话，遗憾的是 .NET
Regex 不支持非 BMP 字符。所以最后检查字符＆gt;带有正则表达式的 0xffff 是没用的。
这段代码“charInfo[category]”显示错误！ （可能是错字）
谢谢@DamilolaAdegunwa，我添加了缺失的部分，并将代码格式化为更“现代”
d
dengkai
\d 检查所有 Unicode，而 [0-9] 仅限于这 10 个字符。如果只有 10 位数字，你应该使用。其他的我推荐使用\d，因为写的少。
