This finds a letter and omits all other instances of that letter, leaving you only the distinct letters used in the string.

Useful for automation of making submodule paths as trusted folders for git.

For the day: d Displays the day as a number without a leading zero (1-31). dd Displays the day as a number with a leading zero (01-31). ddd Displays the day as an abbreviation (Sun-Sat) dddd Displays the day as a full name (Sunday-Saturday) ...

For the day: d Displays the day as a number without a leading zero (1-31). dd Displays the day as a number with a leading zero (01-31). ddd Displays the day as an abbreviation (Sun-Sat) dddd Displays the day as a full name (Sunday-Saturday) ...

Based on this expression and updated Oct 2023 using wikipedia

Pattern for validating a definitions.reference.pmcid value in the Citation File Format (CFF), v1.3.0

Validate unicode email addresses

Validate and split street address (street and house number) with trailing house number

Validate and split street address (street and house number) with leading house number

comments section key = value key = ltrim

Get number user format

查找替换

indonesian telephone number

aaa

Match and validate both ipv4, ipv6 and CIDR notation mask!

OK

Group tags and lyrics in one lrc file, multiple lines

Match each tag in a lrc file

Lrc file

Make sure http[s]:// uses two slashes, not one. IIS rewrite rules removes double slashes in the raw URL, breaking YOURLS (PHP) for example. This regexp changes all single slashes to double after a web protocol, including nested querystrings.