Check if a sudoku board is valid or not. The board has to be as a single line. Seen at http://codegolf.stackexchange.com/questions/78210/regex-golf-verify-a-sudoku-solution

Regex for matching only Arabic letters characters

regex valid for json schema with http,https,ftp,sftp protocol

only xxx , xxx.xxx and xxx.xxx.xxx are allowed

little test for g modifier

complete one email validation regex

Finds a line and appends the replacement below it. Tries to preserve indentation (tabs or spaces) and to avoid duplicate replacements. I used it in Sublime Text to batch edit several instances of a JS config object across several files.

validates the format for the rfc

Stone Stuff

Validate IP address and IP address range to. xxx.xxx.xxx.xxx and xxx.xxx.xxx.xxx/xxx

xxx.xxx.xxx.xxx and xxx.xxx.xxx.xxx/xxx