Links to useful RegEx resources.

• Getting Started Tutorial: http://regexone.com (FCC recommended)
• RegEx 101: https://regex101.com

See also: Tutorials | Testing | Games | Blogs | Software

RegEx Tutorial & Guides

• RegEx Tutorial: http://www.regular-expressions.info/tutorial.html (detailed explanation)
• RegEx Cheatsheet: http://www.cheatography.com/davechild/cheat-sheets/regular-expressions
• MDN RegEx Guide: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
• StackOverflow RegEx FAQ: http://stackoverflow.com/a/22944075/1262108
• RegEx Video Tutorial: https://www.youtube.com/watch?v=EkluES9Rvak

RegEx Testing Ground

• RegEx Visualizer: https://www.debuggex.com/?flavor=javascript
• RegEx Challenges in Hackerrank: https://www.hackerrank.com/domains/algorithms/regex (practice)
• RegEx Regexplained: https://leaverou.github.io/regexplained/

RegEx Gameplay

• RegEx Golf: http://regex.alf.nu
• RegEx Crossword: http://regexcrossword.com

RegEx Blog

• Rex Egg: http://www.rexegg.com

RegEx Software Aids

• RegExBuddy: http://www.regexbuddy.com (proprietary)
• Expresso: http://www.ultrapico.com/expresso.htm (free)
• RegEx Coach: http://www.weitz.de/regex-coach/ (free)