A stable and simple RegEx, which escapes double-quotes (") in a CSV file.

Matches version strings.

Should match one of the valid ISO 8601 datetime formats accepted by Forecast.io API: [YYYY]-[MM]-[DD]T[HH]:[MM]:[SS] with an optional time zone formatted as Z for GMT time or {+,-}[HH]:[MM] (with or without separating colon) for an offset

PN"+)["]

This performs a non-rigorous validation of IPv6 addresses. Should be used before handing off the value to a better parser/validator.

infinite emails with ; separator a@b.c;a@b.c;a@b.c;a@b.c;a@b.c

Validates a US mm-dd-yy(yy) with an optional hh:mm:ss time.

find pronouceable 10 letter srings that are either all caps or all lowercases based on jsbin.com pronouceable urls

Capture the outcode portion (first half) of a UK Post Code.

parse auditd logs with fluentd

Matches any digit 0-9

Fraction conversion regex for CS 1671