Tools and materials

Tools

• RegExr - A free online tool for learning, building, and testing regular expressions
• regex101 - Another free online tool for learning, building, and testing regular expressions

Reference material

• Learn regex the easy way - A guide to using regular expressions
• RegExp - JavaScript regular expression reference from Mozilla Developer Network
• Regular Expressions - chapter on regex from the book Eloquent JavaScript
• JavaScript Regular Expression Enlightenment - A detailed guide to regular expressions (advanced level)
• Mastering Regular Expressions by Jeffrey E.F. Friedl - A very comprehensive book covering both basic and advanced regular expressions as well as some programming information and information on the flavours of regex (here it is as an ebook at UBC Library)

Character lists

• ASCII - Wikipedia
• Unicode Character Table
• Emoji unicode characters for use on the web

Challenges

• Regex Crossword - Find the character that matches regex clues for each square in the puzzle
• Regex Golf - Try to match all the words in one column but not the other
• Regular expression exercises - Sketch Engine