i am looking for a regular expression to sort chapters of a contract. Therefore i want to transform this chapter numbering to a 2-digit format "dd.dd.dd". Chapters are e.g.:
1.
1.2.1
...
2.10.4
Chapter numbering:
- 1 – 3 digit sections possible
- each section can have 1 or 2 digits
- dots are optional
My way:
- regex first digits: "
\d+\." - regex second digits: "
\.\d+\.?" - third digits are extracted with a
split()function. - i then assemble the 3 sections to a 2-digit-format (e.g.
02.10.04).
Problem:
- my solution seems not very safe. Because sometimes a dot is used after a digit section, sometimes it is not.
- maybe there is an easier way to simply "format"
Thanks for your support!
Regards,
Fabian
>Solution :
You may try the following find and replace, in regex mode:
Find: (?<=\.|^)(\d)(?=\.|$)
Replace: 0$1
This regex pattern will capture all single digit path values which are sandwiched on both sides by either dots, or the start/end of the string. The replacement prepends a leading zero to make the digits have a width of two. Here is a demo showing that the logic is working.