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is the largest regular expression database for regex pattern and matches containing searchable and filterable records for many different languages
TTML time expression offset-time
DNS hostname well-formedness validation
Validates that a DNS hostname is well-formed only. You will still need to check that the overall length of the hostname, including the implied trailing "." (if not present), does not exceed 255 bytes.
Function Declaration / Expression
find pronouceable 10 letter srings that are either all caps or all lowercases based on jsbin.com pronouceable urls
Removes duplicate lines in text editor
"dot matches newline" must be activated. Search and replace by "" (empty string) removes duplicate lines anywhere in text. Example for Notepad++ use shown under http://stackoverflow.com/questions/3958350/removing-duplicate-rows-in-notepad
apache access log
parse the apache access log
Regex tutorial Case sensitive consonants
With regex you can count the number of matches. Can you make it return the number of uppercase consonants (B,C,D,F,..,X,Y,Z) in a given string? E.g.: it should return 3 with the text ABcDeFO!. Note: Only ASCII. We consider Y to be a consonant! Example: the regex /./g will return 3 when run against the string abc.
validate an IP v4