Case insensitive (of course) All words can all be separated by nothing, spaces, periods, slashes, dashes, or underscores. (So "PO Box 123", "P.O. Box 123", "PO-Box 123", "PO_Box123", etc. all match.) Some valid abbreviations are P/Post/Postal, O/Off/Office, and B/Box/Bx/Bin (as well as N/No/Num/Numb...

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(.)\/\/(.)

Pattern matching and extracting color code formats using RegEx. https://github.com/Kyza/color-regex/

Not only validates valid date/time, but also the number of days in a month (including leap year), and both Z and UTC offset.

text has numbers

Matches the data sent by the twitch IRC and captures into various groups

By inserting this regex in a programming language to test it against Codeforces 1800A you'll solve the task

You can use this regular expression to identify any type of Telegram link. It doesn't matter whether it is t.me or telegram.me. Links including "joinchat" are also accepted.

Regex to detect and extract detail from matrix.to

匹配带引号内容，被引号包含的内容 结构($x) ((前引号)(内容)(后引号)) 整体内容(包含引号)...

Sustitution of comments (one line) // Example ~ input (before) ↓↓ : // comment textplain other-text ...

This regex match group (country & Prefix) Separated by spaces or \s+ ↓↓ Example ↓↓ Australia 61 Dominica 1 (767) República Dominicana 1 (809/829/849) ...

This regex is to match Ascending or descending order of 8 digit number

Capturing the content of column names which are duplicate in nature to extract the actual name and suffix ("right" / "left")

ragex solution for free code camp positive-and-negative-lookahead first assertion is (?=\w{6,}) where im matching for any char (a-z0-9_) and repeating the char matching 6 times, in other words, verifying that this word has 6 char being them a-z or digits. the second assertion was more difficult to...

(\w+)(\s)(\w+)\2(\w+) in this exercise we have to use capture groups and then replace the string order to 'three two one'. But first, when you are using the capture group you may have asked yourself why the code below does not work: (\w+)(\s)\1\2\1 to match the sting "one two three"...

Phone numbers in Belgium. The pattern does match with delimiters such as [\s./-] No global length is checked Accepts number starting by 0 for local dialing Accepts number starting by + (+32 in these tests)

resolving the free code camp reuse-patterns-using-capture-groups problem let repeatNum = "42 42 42"; let reRegex = /^(\d+)([" "])\1\2\1$/; ^ starts with (\d+) a digit with at least one char (or else will count spaces) and have a([" "])(space) after the digit and \1 to repeat the...

/^(0[1-9]|1[0-2])\/?([0-9]{2})$/ /^(0[1-9]|1[0-2]) : First Digit - 0 second digit will be -0 to 9 ----> for Jan to Sep...