正则表达式删除字符前的所有文本 [英] regex to remove all text before a character

问题描述

有没有一种简单的方法可以删除_"之前的所有字符?例如，将 3.04_somename.jpg 更改为 somename.jpg.

Is there an easy way to remove all chars before a "_"? For example, change 3.04_somename.jpg to somename.jpg.

任何关于在哪里学习编写正则表达式的建议也会很棒.我检查的大多数地方都很难学习.

Any suggestions for where to learn to write regex would be great too. Most places I check are hard to learn from.

推荐答案

^[^_]*_

将匹配所有文本直到第一个下划线.用空字符串替换它.

will match all text up to the first underscore. Replace that with the empty string.

例如，在 C# 中:

resultString = Regex.Replace(subjectString, 
    @"^   # Match start of string
    [^_]* # Match 0 or more characters except underscore
    _     # Match the underscore", "", RegexOptions.IgnorePatternWhitespace);

要学习正则表达式，请查看http://www.regular-expressions.info

For learning regexes, take a look at http://www.regular-expressions.info

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