Not really a learning resource but more of general purpose tool which includes support for Regex searching as well as a number of other operations is: https://g

Not really a learning resource but more of general purpose tool which includes support for Regex searching as well as a number of other operations is: https://gchq.github.io/CyberChef/ https://gchq.github.io/CyberChef/ It's got some decent built-in regex examples such as IP addresses, email addresses, dates, etc.