What does this mean? Well for starters, those nice little PCRE shorthands for character classes just don’t work! So putting this in your Varnish VCL will silently do nothing:
if (req.url ~ "/\d+(/$|/\?|\?|$)") ...
whereas this match:
if (req.url ~ "/[0-9]+(/$|/\?|\?|$)") ...
Enjoy.
Simple but effective regex to monitor when there are issues. In my example below, this will show all response times > 1 second:
tail -f production.log | egrep "Completed in [0-9]{3,10}"
I whipped this up to remove all spans and/or divs in an HTML. Don’t ask why. Here’s the regex:
< ?(span|div)[a-zA-Z0-9'" =]+>
Did I mention I love regex?
Enjoy.
When needing to perform a String.replace() with some regex and globally replace text. You must remember to put the “g” argument like so:
var str = “‘http://www.com/123/123′”
str.replace(/’/g,”")
Spent a few minutes banging my head on this one. So remember the “g”!
