An example Regex for validating e-mail addresses

JavaZone 2014, Regex dissected

My relationship to Regex (or Regexp) has always been of the type "google it, copy and paste it, never change it, can't understand anything of it". But so, finally, after years of "copy paste" I went on this talk about Regex on JavaZone and actually began to understand it. And now I'll share this introduction with you.