I would like to know if we can handle specific input like the following examples using pattern:

[1] or [1,2]

so basically brackets with a number or if there are more numbers then only comma allowed as a separator.

Tried [(\d (\s*,?)) ] as stated below but it doesn't work.

CodePudding user response：

This would do it:

^\[\d (?:,\d )*\]$

• ^ - start line anchor
• \[ - open literal square bracket
• \d - one or more digits
• (?: - open non-capturing group
  • ,\d - comma followed by one or more digits
• ) - close non-capturing group
• * - match pattern inside non-capturing group zero or more times
• \] - close literal square bracket
• $ - end line anchor

https://regex101.com/r/eVzjRw/1

CodePudding user response：

Use this regex \[(\d (\s*,?)) \]