Regex find word in the string

Question

In general terms I want to find in the string some substring but only if it is contained there.

I had expression :

^.*(\bpass\b)?.*$ 

And test string:

high pass h3  

When I test the string via expression I see that whole string is found (but group "pass" not):

match : true groups count : 1   group : high pass h3  

But that I needed, is that match has 2 groups : 1: high pass h3 2: pass

And when I test, for example, the string - high h3, I still had 1 group found - high h3

How can I do this?

Answer 1

Use this one:

^(.*?(\bpass\b)[^$]*)$ 

1. First capture for the entire line.
2. Second capture for the expected word.

Check the demo.

More explanation:

          ┌ first capture           |  ⧽------------------⧼ ^(.*?(\bpass\b)[^$]*)$   ⧽-⧼          ⧽---⧼    | ⧽--------⧼  |    |     |       └ all characters who are not the end of the string    |     |    |     └ second capture    |    └ optional begin characters