find any standalone, non-white space character

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

Regular exporession for Nr2000 validation

used to extract doi

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.

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

Patternmatching of several Daterange Patterns Quarter 2021-Q2 Range...

Split number and string exp. data as below 17091327 Ren Xian Xtrcb County Bank Corporation Limited 50156 0862315402 19D 17091342 BaoDing QingYuan District Xtrcb Rural Bank Corporation Limit40156 0862315401 19D

email regex

guif

guif

guif

Intentionally leaves out weird stuff such as IPV4 or IPV6 for the domain part and quoted usernames with invalid chars in the addressee part. Handles internationalized domains with soft validation (only structural matching) and blocks domain parts starting or ending with dashes or containing double d...