It's good because it explains things neatly without unnecessary details.

I wanted to study regular expressions, thank you so much for the helpful lecture :)

Whenever I had to use regular expressions, I would search the Internet and use what someone else had created. Through this lecture, I was able to lay the foundation for understanding and creating regular expressions on my own. I hope you will continue to give me great lectures. Thank you.

It's a good lecture.

I'm going to learn regular expressions properly, which I had only vaguely learned through searches.