reference pattern checking

Use part 1, 3 , 5 for establish the portable callsign like 1 = DL/ 2 = F5UII 3 = /QRP

Zero length negative lookbehind

Please help! This is probably a very simple task for regex experts. I want to extract and group the fields before or after each pipe character |. 1234|text1|text2|text3|text4|text5 Expected result would be separate groups e.g.: 1234...

Easly to check tel:// or sms:// protocols.

Check for correctly formatted array of this type: array(1,2,3,)

Check for correctly formatted array of this type: array('a', 'bb', 'ccccc',)

username

Description here

The special characters are ~!@#$%^&*()

I need to match a pattern as follows with the added limitation that the match must be exactly 7 characters long: /^\d[a-zA-Z]\d$/ In words, this is a 7 character sequence of 6 digits and one alphabetic character in any order. How do I limit the overall length to 7 using regex? Thanks!

Esta expresión regular permite detectar las variables que están declaradas dentro de una url o route del framework Flask, con esto lo único que queda es armar un loop que recorra las coincidencias y que las remplace por los valores adecuados