Regex Comma or Comma Space or Space

Question

My problem is the [,\s|,|\s] will match ", " as "," and leave a extra space So I do not get a match "Sat, Mon" with: ``` (Thu|Fri|Sat)[,\s|,|\s](Mon|Tue) ``` By matching on (Thu|Fri|Sat)[,\s|,|\s] I get a match on "Sat, " but the match.Value is on "Sat," (no space) Basically I want to also get a match on "Sat,Mon" "Sat, Mon" "Sat Mon" but not "SatMon" Thanks

Accepted Answer

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

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

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.

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

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

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

Regex Comma or Comma Space or Space

Solution

Problem