英文:
Regex capture rest of sentance after last match
问题
以下是翻译好的部分：
"Say I have a sentence where I would like to match (and eventually replace but that is not part of the question) certain markers based on what they look like:"
"假设我有一个句子，我想要匹配（最终可能替换，但这不是问题的一部分）某些标记，基于它们的外观："
"I would like to replace the {NUM}, {#NUM} and {NUM#} parts based on logic and the number in the #. And then put it all back together as a single string."
"我想根据逻辑和#中的数字来替换{NUM}、{#NUM}和{NUM#}部分。然后将它们全部拼接成一个字符串。"
"I came up with"
"我想出了以下正则表达式："
"which will obtain the captures I would like, but I cant seem to figure out how to get the REMAINING part of the sentence after the last match, i.e. jumped over the lazy dog."
"这个正则表达式可以获得我想要的捕获，但我似乎无法弄清楚如何获取最后匹配后句子的剩余部分，即jumped over the lazy dog."
"I thought maybe adding (.*?) to the end would do it but it does not. Here is what I have working:"
"我以为在末尾添加(.*?)可能会起作用，但实际上不起作用。这里是我的工作示例："
英文:
Say I have a sentence where I would like to match (and eventually replace but that is not part of the question) certain markers based on what they look like:
The quick brown fox {NUM} jumped over {211NUM} the lazy dog {NUM}. The Quick brown fox {NUM10} jumped over the lazy dog.
I would like to replace the {NUM}, {#NUM} and {NUM#} parts based on logic and the number in the #. And then put it all back together as a single string.
I came up with
(.*?)({NUM}|{\d*NUM}|{NUM\d*})
which will obtain the captures I would like, but I cant seem to figure out how to get the REMAINING part of the sentence after the last match, i.e. jumped over the lazy dog.
I thought maybe adding (.*?) to the end would do it but it does not. Here is what I have working:
答案1
得分: 1
不需要使用字符串的分割/连接来垃圾回收。替换效果很好，没有内存峰值，速度快，还接受函数作为参数：
public class Program{public static void Main(){var pattern = @"(?<num>\{((?<n1>\d+)?NUM|NUM(?<n2>\d+))\})";var regx = new Regex(pattern, RegexOptions.ExplicitCapture | RegexOptions.Multiline);var input =@"The quick brown fox {NUM} jumped over {211NUM} the lazy dog {NUM}. The Quick brown fox {NUM10} jumped over the lazy dog. ";var output = regx.Replace(input, ToReplaceMatch);Console.WriteLine(output);}private static string ToReplaceMatch(Match match){if (match.Groups["num"].Success){var num = int.TryParse(match.Groups["n1"].Value ?? match.Groups["n2"].Value, out var res)? res: (int?)null;return ToReplaceNum(num);}return match.Value;}private static string ToReplaceNum(int? number){return "FOOBAR" + (number ?? 0);}}
输出：
The quick brown fox FOOBAR0 jumped over FOOBAR211 the lazy dog FOOBAR0. The Quick brown fox FOOBAR0 jumped over the lazy dog.
英文:
No need to trash garbage collector with split/concating strings. Replace works good, no memory spikes, fast, accept functions as argument too:
public class Program{public static void Main(){var pattern = @"(?<num>\{((?<n1>\d+)?NUM|NUM(?<n2>\d+))\})";var regx = new Regex(pattern, RegexOptions.ExplicitCapture | RegexOptions.Multiline);var input =@"The quick brown fox {NUM} jumped over {211NUM} the lazy dog {NUM}. The Quick brown fox {NUM10} jumped over the lazy dog. ";var output = regx.Replace(input, ToReplaceMatch);Console.WriteLine(output);}private static string ToReplaceMatch(Match match){if (match.Groups["num"].Success){var num = int.TryParse(match.Groups["n1"].Value ?? match.Groups["n2"].Value, out var res)? res: (int?)null;return ToReplaceNum(num);}return match.Value;}private static string ToReplaceNum(int? number){return "FOOBAR" + (number ?? 0);}}
Output:
The quick brown fox FOOBAR0 jumped over FOOBAR211 the lazy dog FOOBAR0. The Quick brown fox FOOBAR0 jumped over the lazy dog.
答案2
得分: 1
你可以尝试使用这个正则表达式模式仅匹配你的关键词：(?<g1>{NUM})|(?<g2>{\d*NUM})|(?<g3>{NUM\d*})，然后使用Regex.Replace函数基于你的逻辑替换关键词。
string pattern = @"(?<g1>{NUM})|(?<g2>{\d*NUM})|(?<g3>{NUM\d*})";string input = "The quick brown fox {NUM} jumped over {211NUM} the lazy dog {NUM}. The Quick brown fox {NUM10} jumped over the lazy dog.";output = Regex.Replace(input, pattern, delegate(Match match){if (match.Groups["g1"].Success){return "{Group 1}";}if (match.Groups["g2"].Success){return "{Group 2}";}if (match.Groups["g3"].Success){return "{Group 3}";}return match.Value;});
请参考此处的演示。
英文:
You could try to match only your keywords using this regex pattern: (?<g1>{NUM})|(?<g2>{\d*NUM})|(?<g3>{NUM\d*})
Then using Regex.Replace function to replace keywords based on your logic.
string pattern = @"(?<g1>{NUM})|(?<g2>{\d*NUM})|(?<g3>{NUM\d*})";string input = "The quick brown fox {NUM} jumped over {211NUM} the lazy dog {NUM}. The Quick brown fox {NUM10} jumped over the lazy dog. ";output = Regex.Replace(input, pattern, delegate(Match match){if (match.Groups["g1"].Success){return "{Group 1}";}if (match.Groups["g2"].Success){return "{Group 2}";}if (match.Groups["g3"].Success){return "{Group 3}";}return match.Value;});
See demo here
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