Checks validity of an EA number first two digits 01-12 followed by hyphen then a number from 0-4 and then 4 numbers or uppercase letters and ending in a 1 or 4 for example "05-1J7601". Adding a capital C to the beginning is also accepted "C05-1J7601", along with the entry of 2 X's hyphen and 6 X's ...

With this C# regex, you can easily match/Parse Nested HTML tags. Example input: someTitle ...

Match any layer bracket pair

f_name may contain spaces, numbers, characters,... so I would go for a but then I couldn't use [...]? anymore to match the second line?

Match regular expressions substitutions, I personally use this to perform my validate if it is a substitution, then call re.sub() on it.

This expression should both normal and wildcard targets and rules wrapped in simple sub-shell or varriable substitution enclosures.

looks for a sad smiley with a backslash

If pattern match, then this number probably is a phone number in Taiwan.

Match 5 forward slashes

regex to consider exceptions in log4j

get ip identifier, queue name, email domain and status from postfix log

Regex to match standard timecode format. (Updated with fewer groups).