Policy: At least five digits. No whitspaces. Two out of four groups - digits, lowercase, uppercase, special charterers

Prevent acidental deletion of important system files and user directories.

Validates upper and lower case, allows all : or all -. Obtained here: http://stackoverflow.com/questions/4260467/what-is-a-regular-expression-for-a-mac-address ...

Used in JavaScript, can create a string of hard word-wrap text. Expression used 80 as the word-wrap point, but it can be changed to suit your purpose. RegEx provided by @DanThomas. TAGS: @WordWrap @Word-Wrap

A pattern to parse Amazon Web Services ARNs into their varying components: Partition Service Region AccountID...

This can be used in webMethods for checking whether the string is not null or blank

regex made to match any ftp or sftp url with a limited number of subfolder

I use this when doing full text searches in my IDE and want to find specific uses of a method (or function).