regexp for year filtering

Besides leap year handling, this takes care of date validation in the yy-mm-dd format.

Extract jsfiddle links

this is the most perfect pattern I reach for url with query or anchor

exludes all address with po box

Find single digits that are not part of an integer. For example, "27" should not match, but "27.1" will match the "1". "27.11" won't match.

Local variable and function parameter names should comply with a naming convention

Nickname validation. Only: letters _ One line. Tested with RoR

This expression converts any 3- or 4 digit timevalue to a value with colon between hours and minutes. So 345 is converted to 3:45 and 1500 is converted to 15:00

retrieve multiple lines from an email body.

Validate Phone number even if contain country code