select subdomain

find any standalone, non-white space character

It won't recognize if the local-part is just one character like t@somedomain.com

Your password should include at least 8 characters, uppercase and lowercase letters, numbers and at least one special character.

Regular exporession for Nr2000 validation

used to extract doi

find tag, but you can adapt to other tag

匹配图片链接

匹配md图片

Not Funny vs Funny - need to match for both cases

Regular expression to match all C style comments.

select 09|10

hi

reverses order when code is followed by comments (comments prepended with ## )

Python does not support conditionals using lookaround, even though Python does support lookaround outside conditionals. (?(?=regex) then|else) is illegal in python (?=regex)then|(?!regex)else - this works. madness details in the test strings

Matches the image mime types. E.g image/png, image/jpeg, etc.

Türkiye'nin mobil telefonlarının desenini kontrol eder. Örneğin; 555-123-45-67 0 555 123 45 67 +905551234567...

Rackerrank regex prepare

starts with number and ends with string or number starts with +ve, -ve or decimal number