Purpose This pattern is used to parse human readable text strings regarding file sizes. The pattern names four capture groups in the string for the following purposes: ...

Match Brazilian documents

非法发

完形填空

Stuff for a dnd thing

Detects specific prefixes followed by number series

Detects specific word in a sentence

Detects UK postcodes (minimal edge cases)

regex for user name with criteria: Minimum 2 character Maximum 30 character Character must be alphanumeric, except first character is alphabetical Character "_" and "." is allowed once between first and last character

Simple search of string length with the regexp

replace url that has a hash or slash with slash

must use at least three of the four available character types: lowercase letters, uppercase letters, numbers, and symbols.

Extract the numerical ID of a VK Commmunity fromit's wall url.

Attempting to match valid US phone number formates

regex for get video id in link

get files extension

The regular expression separates the beginning and end of the tag, as well as everything between them into separate groups.

find and replace text in tag

^(?:3[01]|12|0?[1-9])([\-/.])(0?[1-9]|1[1-2])\1\d{4}$

check ua phone number