test z wyrażeniem regularnym

The following is a dictionary of 4991 portuguese words ordered by frequency. I need the file to have just number of line and word like the following 11 lines of example. So I need to delete all lines that don't start with a number and delete everything after number and word. Also delete all lines wi...

Scrape DeviantArt's search page HTMl to extract the category, the id, the user and the image url of each post.

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Given a string that represents a location in the USA, find any version of the USA country name as one would expect at the end of that string. Does not match on if it finds it elsewhere such as a freeway name or the "us" in the city of "Russellville".

This Regular Expression Validates SIP Addresses

Matches CNPJ, which is an identification number issued to Brazilian companies.

Parse for the BIGipServerPool set by F5 load balancers

Splits the css code into two blocks. (comments|selector block)

Email clients insert the "sender wrote" line to email replies.

Email clients add this line, call it "sender wrote" to reply emails.

Easily match the {{}} string for web developper MVC.