s

Example of how to pull a particular piece of the URL

email address regex

The capture group returns only a number with a dot if it has decimal digits, otherwise it is treated as an integer. 1.1 => 1.1 1\. => 1

Reference: https://stackoverflow.com/a/34669019/369727

about medicine

匹配小数位的整数，或者匹配整数

Given a string, generate random alpha characters of a particular length

Json add q

Tte pattern to grep the multilayer numbered list bullets: 1. level 1 1.2. level 1.2 1.2.1. level 2.1 1.3. level 1.3 1.4. level xxx...

Mac address is 6 parts of 2 hexadecimal digits separated by a special character "-" so, there are 5 parts of digits followed by the character "-" then, one part without that character.

Setup php source extension regex

guif

Eine Aufgabe die man Lösen muss, wenn man die Lösung kennt.

Alien Registration Number

guif

guif

guif

guif

Phone number regex