Remove leading "http://" or "https://" and optionally a "www." for look up

Evaluates a string such that only letters, digits, and the special characters !, #, and $ are allowed. Length 8 - 64

To check whether the given String contains 3 or more consecutive single digit numbers

This expression escapes characters, which have a special meaning in regex, like .?[]/ and so on. Use it to transform a string that you want to use literally in another regex. This is the second version, bug in replace string has been fixed.

simple url to web site match (es6)

Let's me extract time values from a conversation.