In this impromptu session we used the HiFi Regex Tool (http://www.gethifi.com/tools/regex) to cover introductory regular expression concepts, some advanced concepts, and then how to make use of regular expressions in JavaScript. Some of the points we discussed:

• Simple pattern matching
• Character classes
• Capturing groups
• Using JavaScript's RegExp object for test() -> true/false, and match() -> matches array
• Using regular expressions on the JavaScript string object's replace() method