正则表达式逗号或逗号空间或空格 [英] Regex Comma or Comma Space or Space

问题描述

我的问题是[，\ s |，| \ s]会匹配，" as，"，并留出多余的空间

My problem is the [,\s|,|\s] will match ", " as "," and leave a extra space

所以我没有匹配"Sat，Mon":

So I do not get a match "Sat, Mon" with:

(Thu|Fri|Sat)[,\s|,|\s](Mon|Tue)

通过匹配(Thu | Fri | Sat)[，\ s |，| \ s]我在星期六"上找到了匹配项，但match.Value在星期六"上(没有空格)

By matching on (Thu|Fri|Sat)[,\s|,|\s] I get a match on "Sat, " but the match.Value is on "Sat," (no space)

基本上我也想在"Sat，Mon"，"Sat，Mon"，"Sat Mon"而不是"SatMon"上进行比赛

Basically I want to also get a match on "Sat,Mon" "Sat, Mon" "Sat Mon" but not "SatMon"

谢谢

推荐答案

(Thu|Fri|Sat)[,\s]\s*(Mon|Tue)

这将允许逗号或空格以及 Mon 或 Tue

This will allow comma or space and any additional space before Mon or Tue

您的版本将字符类和替换的概念混为一谈.用 | 分隔选项的替代必须在括号内.我们可以使用(?:)语法使这些括号不被捕获.

Your version was conflating the notions of character classes and alternation. Alternation, where you separate options with | must be inside of parentheses. We can make these parentheses non-capturing using the (?: ) syntax.

以上，我使用了字符类.要使用交替:

Above, I used a character class. To use alternation:

(Thu|Fri|Sat)(?:,|\s)\s*(Mon|Tue)

我已经使用 \ s 表示空格，但是出于您的目的，您可以将它们替换为文字空间.

I have used \s to denote whitespace, but for your purposes you could replace them with a literal space.

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