I got you covered fellow Lua user

http://leafo.net/guides/parsing-expression-grammars.html

http://www.wra1th.plus.com/lua/lpeg.html

http://www.wra1th.plus.com/lua/peg/PEG.html

http://lua-users.org/wiki/LpegTutorial

https://rawgit.com/dlaurie/lua-notes/master/lpeg-brief.html

http://www.inf.puc-rio.br/~roberto/lpeg/

http://lua-users.org/wiki/LpegRecipes

> Remove all the Javascript from an html page.

This is probably the best reason I've seen why you should learn parsing.

They're... beautiful.

I keep feeling like I'm following in the steps of giants with lpeg. I loved my introduction to it when I was big on Lua. Some of those operators take functions with such strange signatures - until you try to do something clever later, and your realize you're being passed exactly the arguments you need to make it work.