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Development Tools Introduction to Regular Expressions Regular Expressions Using Wildcard Characters

Richard Külling
Richard Külling
9,465 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!

Steven Parker
Steven Parker
229,005 Points

You can report course bugs as described on the Support page. And if you are the first to report it, you will get an "Exterminator" :beetle: badge!

3 Answers

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/

Richard Külling
Richard Külling
9,465 Points

Have sent a mail about the missing notes, thanks!

Teachers notes: Question 4

The special characters you are referring to can be excluded with the \w character class. Using \w will match any alphanumeric character from the basic Latin alphabet, including the underscore. Equivalent to [A-Za-z0-9_], which will also result in excluding $%#$@.

You can read further on all the character classes here and more about regular expressions here.