Yep, that website is a good way to interactively solve/learn. The site also includes quiz, cheatsheets, etc. I mention it in an interlude chapter, along with r

Yep, that website is a good way to interactively solve/learn. The site also includes quiz, cheatsheets, etc. I mention it in an interlude chapter, along with regexr[1], regulex [2], debuggex[3] and regexcrossword [4] [1] https://regexr.com/ https://regexr.com/ [2] https://jex.im/regulex/ https://jex.im/regulex/ [3] https://www.debuggex.com/ https://www.debuggex.com/ [4] https://regexcrossword.com/ https://regexcrossword.com/