How to detect regex pattern for strings with underscore?

@mac 

To detect regex patterns for strings with underscore, you can use the following regular expression:

1

^.*_.*$

Explanation:

• ^ : asserts position at start of the string
• .* : matches any character (except for line terminators) zero or more times
• _ : matches the underscore character
• .* : matches any character (except for line terminators) zero or more times
• $ : asserts position at the end of the string

This regex pattern will match any string that contains at least one underscore character.