This will match only words that include chemical elements: H + Og + W + Ar + Ts but not Eton. It allows internal overlap: LaG = La + Ag, and allows the first letter or last letter to be the end/start of a symbol to allow chaining. You can easily remove the various pieces, though. A single-line (non...

Simple Regex to *validate * (no extraction!) an IPv4 Range which can be a comma separated mixture of IPv4 addresses IPv4 CIDRs IPv4 Ranges like 1.1.1.1-1.1.1.10 Examples : ...

testing

Below regex pattern help to extract needful information from Portable export of SSH sessions. Although not complete, can help data extraction from export file.

A regular expression for searching for phone numbers in the Russian format, taking into account different ways of writing the number, including spaces, brackets and dashes. Регулярное выражение для поиска номеров телефонов Российского формата. Учитывает написание номера через пробел, скобки, тире и ...

Description Inspects lines that contain only a character, let's say c, repeated n times. The name of the matching groups will tell you if n is 0, the unit 1, a prime number, or a composite number. Alternative ...

Given a version number MAJOR.MINOR.PATCH, increment the: MAJOR version when you make incompatible API changes. MINOR version when you add functionality in a backward compatible manner. PATCH version when you make backward compatible bug fixes. A pre-release version MAY be denoted by appending a hyp...

Match the web URL, like https://xxx.com or xxx.com, not matching the email or the ip address

Part 2 of my post.

96 Bit encryption by using a library. Possible to extend this beyond 96 if you have the time! Look at my other post to see how to decrypt. Based on using a library of values.

Matches one side of a chemical equation. So for ` 2HCl + 2Na → 2NaCl + H2 ` it would match each side individually with one newline between each 2HCl + 2Na and 2NaCl + H2

Describes how the first few lines of an Antimony (for Tellurium) CRN definition should look like

substitutes \[...\] with $$...$$

Substitute the oneliner GPT equations \(..\) to tex like i.e. $..$

Remove leading and trailing slashes

/^select\s+(?.+?)\s+from\s+(?\S+)\s*(?:where\s+(?[\d\w= ><!]+))?;?$/gmi

regex to validate mobile numbers all over the world

Credit Card Carrier Prediction This regex is specifically designed to predict from the first few characters which carrier type the credit card number is.

Matches some number of a's followed by the same number of b's, usually written as a^nb^n for all natural numbers n. For regular expressions as formally defined in formal language theory, this is impossible, but modern day regex engines can do far more than match just regular languages. Note that eve...

for finding and extracting numbers from the viewbox attribute. see also my generalized SVG number regex. v2: added support for scientific notation