how to use regex group match and use matched group name label?

[sunkaifang]

such as ,I have group match: (A).(B).(C), could I generate label named with : A-C? no use B.
now, I found that ,the label is named:(A).(B).(C). can't get rid of B.
what need I do?
thx a lot.

[jburgess]

@sunkaifang You can use gsub with a capture group. Example:

labelName: '{{gsub .paramName "^(.*)\.(.*)\.(.*)$" "\\1-\\3"}}'