如何在正则表达式匹配中增加？ [英] How do I do a increment in a regex match?

问题描述

如何添加一个选项以将正则表达式的数字部分增加+1。

我写了以下示例



我的尝试：

 string input =dsfjl kfjd dsfds fds sd abc3，abc4，abc5 dsfdgfdf ggd gdfg dfg gdfg dfg gdf ​​gf g abc13 abc14 abc20 abc21 abc22 dsfsdf abc13，abc4，abc5; 
正则表达式rx =新正则表达式（@（？：abc（\d +）\ * *，？\ * *）{2，} abc（\d +））; 
 foreach（在Regex.Matches中匹配m（输入，rx.ToString（）））{
 Console.WriteLine（m.Value）; 
} 
 Console.ReadKey（）; 

生成的输出是

 abc3，abc4，abc5 
 abc13 abc14 abc20 abc21 abc22 
 abc13，abc4，abc5 

但我想得到输出为

abc3，abc4，abc5

abc20 abc21 abc22

即只获得数字增加+1的连续匹配

如何在我的代码中实现？

解决方案

< blockquote>不要。

正则表达式是字符串处理器，并且在模式匹配方面非常出色 - 但它们没有任何数字概念，所以递增计数器的整个想法不具备对他们来说很容易 - 你必须手动编码每个数字并处理溢出，记住也要处理每个数字。

使用正则表达式捕获匹配，但处理匹配在你的代码中建立排序并删除那些不合适的。

Quote：

如何在正则表达式匹配中增加？

你没有

使用RegEx获取所有匹配的列表，然后使用一小段代码来过滤/订购列表。

*****

只是一些有趣的链接，可以帮助构建和调试RegEx。

以下是RegEx文档的链接：

perlre - perldoc.perl.org [ ^ ]

以下是帮助构建RegEx并调试它们的工具的链接：

< a href =http://regexstorm.net/tester> .NET正则表达式测试程序 - 正则表达式风暴 [ ^ ]

Expresso正则表达式工具 [ ^ ]

RegExr：Learn，Build，&测试RegEx [ ^ ]

此节目RegEx是一个很好的图表，它非常有助于理解RegEx的作用：

Debuggex：在线可视正则表达式测试器。 JavaScript，Python和PCRE。 [ ^ ]

How do I add an option to increment the digit part of a regex by +1.
I have written the below example

What I have tried:

string input="dsfjl kfjd dsfds fds sd abc3, abc4, abc5 dsfdgfdf ggd gdfg dfg  gdfg dfg gdf gf g abc13 abc14 abc20 abc21 abc22 dsfsdf abc13, abc4, abc5";
			Regex rx = new Regex(@"(?:abc(\d+)\s*,?\s*){2,}abc(\d+)");
			foreach (Match m in Regex.Matches(input,rx.ToString())) {
				Console.WriteLine(m.Value);
			}
			Console.ReadKey();

The output generated is

abc3, abc4, abc5
abc13 abc14 abc20 abc21 abc22
abc13, abc4, abc5

But I want to get the output as
abc3, abc4, abc5
abc20 abc21 abc22
i.e. get only the consecutive matches that have the digits incremented by +1
How do I implement that in my code?

解决方案

Don't.
Regular expressions are string processors, and are excellent at pattern matching - but they don't have any concept of numbers, so the whole idea of "incrementing a counter" does not come at all easy to them - you would have to manually code for each digit and handle overflow, remembering to handle each digit there as well.
Use a regex to capture the the matches, but process the matches in your code to establish the ordering and remove those that don't fit.

Quote:

How do I do a increment in a regex match?

You don't
Use the RegEx to get a list of all matches, then use a little piece of code to filter/order the list as you want.
*****
Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]

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