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Richard Külling9,465 Points
The Teacher's notes do not include the part about "special characters" as mentioned in the video at 1:40
Where / when can I find that information? Cheers!
Try googling "RegEx Cheat Sheet pdf"
There are very handy cheat sheets you can refer to and even print for just about any programming language. They are great refreshers!
One of the first things I do before learning any new language is print a cheat sheet and use it as a guide before starting a Treehouse Track. I find it easier visually and like writing notes on paper.
Here's the first one I found... https://zeroturnaround.com/rebellabs/java-regular-expressions-cheat-sheet/