works great for repeated text lines

This is a regex in JS for a problem in retake exam of SoftUni.

Recently, I was looking for a regular expression to validate a file path and extension. I found several of them on Google, but none of them fit my requirement. So I decided to put together a version that suits my need. Here is the Regular Expression to validate the file path and extension and it is ...

Regex to extract a Number with 9 digits