Building regex for special case

Question

My text can contain values like these:-

1. [Other]
2. A,B,[Other]
3. [Other][N/A]
4. [Other]Hello
5. [Other]Hello,baby

I want a regex expression which can satisfy only case 4 and 5. For the first three cases, it should fail. In my case, [Other] is fixed in the string value. We can simplify the regex with hardcode of [Other]. For case, event text [N/A] is fixed, so that makes it different from case 4 and 5.

• The string must start with word [Other]. The string must not contain word [N/A]. The string must not have word [Other] alone.

Pls help and suggest the regex expression.

For testing, pls use http://www.gskinner.com/RegExr/

Answer 1

试试这个regex ：

^\[[^\]]+\][a-zA-Z,]+$

Answer 2

Depends what exactly you want to match, but this works for your case

^\[Other\][^\[]+$

Which breaks down like... start ( ^ ) followed by the string [Other] (escaped) followed by not [ ( [^\\[] ) one or more times ( + ) followed by end ( $ )

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EDIT Or a more specific version (as per comment) is as above, but second half has not [ followed by not N followed by not \\ optionally, followed by not A optionally, followed by not ] followed by zero or more of any character ( .* ) end ( $ )

^\[Other\][^\[][^\N]?[^\\]?[^A]?[^\]]?.*$