This regex prevents the writing of non-standard conventional commits. I'm available on my github

http://stackoverflow.com/questions/2362985/verifying-a-cron-expression-is-valid-in-java

RegEx email /^((?!\.)[\w-_.]*)(@\w+)(\.\w+(\.\w+)?)$/gim; Just playing with Reg Ex. This to validate emails in following ways The email couldn't start or finish with a dot The email shouldn't contain spaces into the string The email shouldn't contain special chars ( mailname@domain.com First group takes the first string with the name of email \$1 => (mailname) Second group takes the @ plus the domain: \$2 => (@domain) Third group takes the last part after the domain : \$3 => (.com)

Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.

Validate and capture dateTime parts, includes validation for leap years, range 1000-2999. Fixed bug

MasterCard - ^5[1-5]\d+ Visa - ^4\d+ Amex - ^3[47]\d+ Discover - 6011|65|64...

Validates that a DNS hostname is well-formed only. You will still need to check that the overall length of the hostname, including the implied trailing "." (if not present), does not exceed 255 bytes.

Validate a Json Web Token (JWT).

Check for true or false street address format

checks for valid PAN card for Indian users.

Regular expression for password validation Rules: 8-120 chars no spaces must contain at least one a-z char must contain at least one A-Z char must contain at least one digit must contain at least one of the folowing chars: !@#$%^&*()-=¡£_+`~.,/?;:'\"|[]{}

Checks validity of an EA number first two digits 01-12 followed by hyphen then a number from 0-4 and then 4 numbers or uppercase letters and ending in a 1 or 4 for example "05-1J7601". Adding a capital C to the beginning is also accepted "C05-1J7601", along with the entry of 2 X's hyphen and 6 X's "XX-XXXXXX"

This is a bit simpler version that is still quite robust. It was taken from a Formik example.

Validates subdomain, root domain, and wild card domains

Pedro al DAMS

Besides leap year handling, this takes care of date validation in the yy-mm-dd format.

Handle all condition for ipv6 example: 1) FE80::8329 2) FE80::FFFF:8329 3) FE80::B3FF:FFFF:8329 4) FE80::0202:B3FF:FFFF:8329 5) FE80::0000:0202:B3FF:FFFF:8329 6) FE80::0000:0000:0202:B3FF:FFFF:8329 7) FE80:0000:0000:0000:0202:B3FF:FFFF:8329

Validate IPv4 addresses using PCRE's recursion patterns. A shorter but less efficient alternative to https://regex101.com/r/wZ6oY5/1

This regex matches only when all the following are true: password has minimum 2 uppercase letters password has minimum 2 lowercase letters password has minimum 2 numerals (0-9) password has minimum 2 special characters, of the group !@#$%^&*()-_=+{};:, password has no more than 2 consecutive identical characters password is composed of 12 to 20 characters belonging ONLY to the above character classes (i.e., no whitespace)

validate an IP v4

Validates a date with ISO 8601 format. Source: http://www.pelagodesign.com/blog/2009/05/20/iso-8601-date-validation-that-doesnt-suck/

This regular expression provides a balance between RFC compliance and security-best-practices. It is designed to prevent injection vectors in legacy systems by using a restricted "safe" character subset recommended by the OWASP Validation Regex Repository. Pattern: ^A-Za-z0-9(?:\.A-Za-z0-9_+&-]+)*@(?:[A-Za-z0-9{0,61}[A-Za-z0-9])?\.)+[A-Za-z]{2,63}$ Key Features: Forced Alphanumeric Start: Prevents leading hyphens to avoid command injection vulnerabilities. Security Subset: Restricts special characters to _+&*- to prevent exotic character injections (e.g., pipes or backticks). No Quoted Strings: Forbids quoted strings to eliminate dangerous payloads containing spaces or backslashes. DNS Compliance: Enforces label lengths (1–63 characters) and prevents labels from starting or ending with hyphens. Whole String Anchoring: Uses ^ and $ to ensure the entire input is validated.

CRON validation Validates CRON pattern (Quartz) and supports groups. Useful for e.g. typescript or other typed languages. The following greoups are covered: second minute hour day of month month day of week year A group generally consists of START_{GROUP}, DELIMITER_{GROUP} and END_{GROUP} containing the first character of the group, the used delimiter (generally ,,-,/) and the last character. If a group has a delimiter (typeof DELIMITER_{GROUP} !== "undefined") you can split a complete group into an array by using the groups delimiter on the group string. Example const cronregex = cronstring.match(regex); //this regex string const regexgroups = cronregex.groups as RegexGroups; //custom stype const secondsarray = regexgroups.SECOND.split(regexgroups.DELIMITER_SEC); //every character as array item More information: https://docs.openinc.dev/docs/opendash-core/overview

Matches a list of cron expressions which are valid in the Quartz .NET library Quartz Net Cron Expression

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 dashes (except in xn-- internationalization prefix).

Eircode validation for new postcodes identifiers in Republic of Ireland. Case-insensetive for easier user input. Added optional space separator to follow same pattern as in UK post codes and in examples used in eircode spec.

It validates an email address with alias

Checks for password containing at least 1 Upper case, 1 lower case, 1 digit and 1 special character, all together with a length of at least 8. (This pattern allows any order of the requried elements, other than what was been distributed here before)

validating uri template

United States City name validation

validation for Argentina postal codes, previous four digits + new CPA

Based on http://www.regular-expressions.info/creditcard.html This example includes test strings. This only validates the pattern, and not whether the credit card number passes a checksum validation. See the Luhn algorithm for details https://en.wikipedia.org/wiki/Luhn_algorithm For an implementation in Lasso, see https://github.com/stevepiercy/sp_valid_creditcard

https://www.google.com http://www.google.net/hello https://www.google. http://www.google./hello above url matching with given regex

A zipcode regex for validation of both US and Canada

Date Validation with leap year handling, & it takes care of date validation in the format like :mm/dd/yyyy or mmddyyyy or mm-dd-yyyy or m/d/yyyy or m-d-yyyy. 12/01/1986 02/29/2016 02/29/2015 13/31/1986 12/31/1980 1/32/2015 1/31/2015 01012016 01/01/2016 1/1/2016 1/1/16 01/01/16 01-01-2016 1-1-2016 1-1-16 01-01-16

Very crude, but effective email validation.

Valid 0.0.0.0 1.1.1.1 101.101.101.101 255.255.255.255 156.0.1.10

Fully qualified domain name validation

this regular expression allow numbers with one number from 1 to 5 and only one decimal value Onlys accept numeric values from 1.0 to 5

Matches all valid, current UK Postcodes, including Girobank and non-geographic postcodes, irrespective of whether they contain a space. It does not include overseas territories. Adapted from the BS7666 postcode rules at http://www.cabinetoffice.gov.uk/govtalk/schemasstandards/e-gif/datastandards/address/postcode.aspx

Use this Regex for server-side validation also with some slight modifications like so for .NET -- @\w+(-+.']\w+)@\w+([-.]\w+)\.[a-zA-Z0-9]{2,6}([-.{2,6})*;

Regular for testing empty strings for validation purpose

This is a regular expression for date in javascript. It validates the month between 01-12 (double digits only). It validates the day between 01-31 (double digits only). And enforces 4 digit year (no validation for range).

Supported formats (mobile): +7(xxx)xxx xxxx +7(xxx)xxxxxxx +7(xxx)xxx-xx-xx +7(xxx)xxx xx xx +7 xxx xxx xx xx +7 xxx xxx-xx-xx +7xxx xxxxxxx +7 xxx xxx xxxx +7 xxx xxx-xxxx +7xxxxxxxxxx 7(xxx)xxxxxxx 7(xxx)xxx-xx-xx 7(xxx)xxx xx xx (xxx)xxxxxxx (xxx)xxx-xx-xx (xxx)xxx xx xx 7 xxx xxx xx xx 7 xxx xxx-xx-xx 7xxx xxxxxxx 7 xxx xxx xxxx 7 xxx xxx-xxxx 7xxxxxxxxxx xxxxxxxxxx Home phones: ex.: +7(813)78 444-xx +7(xxx)xx xxx-xx +7(xxx)xx xxx xx +7(xxx)xx xxxxx +7xxxxx xxx-xx +7xxxxx xxx xx +7xxxxx xxxxx +7xxx xx xxx xx +7xxx xx xxx-xx +7xxxxxxxxxx 7(xxx)xx xxx-xx 7(xxx)xx xxx xx 7(xxx)xx xxxxx 7xxxxx xxx-xx 7xxxxx xxx xx 7xxxxx xxxxx 7xxx xx xxx xx 7xxx xx xxx-xx 7xxxxxxxxxx xxx-xx xxxxx

Does not match everything, but good for a cross-platform validation filter.