This contains various regexes that I find useful.
Match any character except newline
.
Match first word of a string on multiple lines
/(word1|word2|word3)/igm
Multiple lines of neg and pos floating point numbers that are less than 1000
/^-?\d{1,3}\.\d+$/igm
Do not return result from a group
(?:)
For example, do not return the year from this string:
12/06/2016 05:52
(^\d{2}\/\d{2}\/(?:2015|2016) (\d{2}:\d{2})$)
You'll note that everything else is being captured, as well as the time being caputured by a specific group. However, this will not include 2015 or 2016.
Doesn't start with http
/^((?!http).)*$/
Remove http(s) from every line
s/^http.?:\/\///g
Match 2 or 3 digits
^[0-9]{2,3}$
Resource: https://stackoverflow.com/questions/20537762/regex-to-match-d-or-e-followed-by-2-3-digits