Regular Expressions 101

([!-\~]aeiou)

check emailnot match double simbol login..name@domain.com

'test' - no match 'test test' - no match ' test' - match (space at the start) 'test ' - match (space at the end) 'test test' - match (single space in the middle)

Verify your tax code (Codice Fiscale in Italian)

works but capturing groups are not so organized testing string: "https://127.0.0.1:8000/path/subpath/otherpath" "https://127.0.0.1/path/subpath/otherpath" "https://127.0.0.1/12345/subpath/otherpath"

Checks for well formed tags. Must include mailto, http or https. Must have quoted href. Other attribues before or after href are accepted. Must be ended with

In Vehicle Identification Number used by motor vehicle manufacturers, the letters I, O and Q are omitted for their similarity to 1 or 0.

Matches phone #s (aaa) bbb-cccc aaa bbb cccc aaabbbcccc and such.

The way I like it formatted

https

Capturing lucene special characters for escaping

Detects SYNTACTICALLY correct chess moves (i.e. it doesn't check whether the move itself is actually valid)

few

Will select everything between the double quotes in an Iframe's src tag. Useful for retrieving/replacing the URL.

url