Regular Expressions 101

"^([\w_]+)(?:\{(*)\})?\s+([\d\\.e+-]+)(?:\s+(\d+))?$"gm

Custom tags expression used in cApStAn's build of OmegaT

Flagged / disallowed text expression used in cApStAn's build of OmegaT

Analyze whether the torrent name is a Movie or TV Episode Inspired from https://regex101.com/library/yP4bY4 There is two versions, see differences at the bottom Groups:...

Simple prefix matcher for validating URI Schemes according to [RFC2396, Section 3.1]( http://www.faqs.org/rfcs/rfc2396.html#3.5:~:text=well%20as%20%22http%22%29.-,scheme%20%20%20%20%20%20%20%20%3D%20alpha%20*%28%20alpha%20%7C%20digit%20%7C%20%22%2B%22%20%7C%20%22%2D%22%20%7C%20%22.%22%20%29,-Relativ...

A regex for validating decimal numbers in the European number format (in many parts of Europe at least, including Germany). A comma is used as a separator for the decimal number, a dot as a separator for thousand places.

Matches subdomain, domain and top level in a field that contains a urls. https://www.whatever.you.want ---> whatever.you.want

Regex expression for comparing decimal numbers with the usual comparison operators such as (greater than), >= (greater than or equal to), != (not equal to), == (equal to), ... The regex also allows filtering of data from e.g. a database, whereby the first value is not needed, e.g. [FIELD] < 100

^(((\d{3}1-9]|\d{2}[1-9]\d|\d[1-9]\d{2}|[1-9]\d{3})(\/)(((0[13578]|1[02])(\/)(0[1-9]|[12]\d|3[01]))|((0[469]|11)(\/)(0[1-9]|[12]\d|30))|(02(\/)(0[1-9]|[1]\d|2[0-8]))))|(((\d{2})(0[48]|[2468|13579)|((048]|[2468|3579)00))(\/)02(\/)29))$ Match year/month/day, date format. E.g: 2021/08/25 [match] 2021/...

Regex to select PlantUML Block in Asciidoc documents

Aquivalent solution for golang's unsupported negative lookahead in re2 flavor of go's regex. This example provides a negative lookahead similar to (?!/api/) ignoring routes with the /api/ prefix at the start.

Matching for mikrotik ROS 7 Used in promtail and grafana

Crude CSV regex to split only by characters surrounded by non-whitespace characters. Ignore that it dosen't highlight all of the other commas in the editor. If you select the g regex flag it will properly show here, but not work in Java. Credit to @merosity (Merosity#0135) on Discord!

Regular expression to check the email syntax validity. Certainly requires improvement, but it's a good basis to work from. Work with Java and JavaScript.

match: #aabbcc #abc (255,255,255) (255,255,255,255) 255,255,255 no match: #gggggg #ggg 256,256,256

Case insensitive match the whole word betwween \bword\b

Validates subdomain, root domain, and wild card domains

Parses the text following a '#' and a space all the way up to the next return character. Additional #'s can be added for parsing of other type of headings!

Extract URL parts only named capturing groups