Identifying substrings based on complex rules

Question

Assume I have text strings that look something like this:

A-B-C-I1-I2-D-E-F-I1-I3-D-D-D-D-I1-I1-I2-I1-I1-I3-I3

Here I want to identify sequ

Answer 1

You can identify the sequences which contains I3 with following regex :

(?:I\\d-?)*I3(?:-?I\\d)*

So you can split your text with this regex to get the desire result.

See demo https://regex101.com/r/bJ3iA3/4