将指数数字字符串表示拆分为幂和指数 [英] Split exponential number string representation into power and exponent

问题描述

我有来自资源的指数形式的字符串，如下所示:2⁴.我想知道是否有办法将其拆分为:

I have strings which come from resources in exponential form like the following: 2⁴. I was wondering if there is a way to split this into:

var base = 2; //or even "2", this is also helpful since it can be parsed

和

var exponent = 4;

我搜索了互联网和 msdn 标准数字也格式化字符串，但我无法找到解决这种情况的方法.

I have searched the internet and msdn Standard Numeric Format Strings also, but I was unable to find the solve for this case.

推荐答案

您可以添加数字到上标数字之间的映射，然后从源中选择所有数字(这将是 base)和所有其他 - 指数

You can add mapping between digits to superscript digits, then select all digits from source (this will be the base) and all the others - the exponent

const string superscriptDigits = "⁰¹²³⁴⁵⁶⁷⁸⁹";
var digitToSuperscriptMapping = superscriptDigits.Select((c, i) => new { c, i })
                                .ToDictionary(item => item.c, item => item.i.ToString());

const string source = "23⁴⁴";

var baseString = new string(source.TakeWhile(char.IsDigit).ToArray());
var exponentString = string.Concat(source.SkipWhile(char.IsDigit).Select(c => digitToSuperscriptMapping[c]));

现在您可以将 base 和 exponent 转换为 int.此外，您还需要在执行转换代码之前验证输入.

Now you can convert base and exponent to int. Also you'll need to validate input before executing conversion code.

甚至没有映射:

var baseString = new string(source.TakeWhile(char.IsDigit).ToArray());
var exponentString = string.Concat(source.SkipWhile(char.IsDigit).Select(c => char.GetNumericValue(c).ToString()));

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