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This regular expression can be used to find tags and hashtags in a string. It assumes that a username can contain both underscores and points (.) and that hashtags can only contain letters

replace tag with doublequotes regex

vvv

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

test

Validates a File Path and makes sure the correct extension is at the end.

Get itunes id from url

why doesn't this match text in brackets?

because everything else is too strict

Finds the protocol, subdomain, ((domain, extension)/ipaddress), port, filepath (split in path and filename), the route and the query string.