How to improve this regex that I wrote?-CodePudding

I wrote this regex.

(?i)(#?covid\s|#?covid\W|#?covid\d )

But it doesn't seem to match uppercase word (COVID). How can I improve it?

Note: One of the requirements is to match covid4me&u. So when there is a number after the word covid is a valid expression.

CodePudding user response：

Assuming you want to make sure you're not matching part of a word, I would use the \b word-boundary instead of matching COVID followed by \W or \s :

(?i)#?covid\d*\b

This avoids problem matching covid at the end of lines that your solution was having.

To handle your updated question's needs I would use the following :

(?i)#?\bcovid(\b|\d )