Question

Was playing around with regexp to remove all numbers from string

I came up to this:

   /([^0-9])$/

But it works only if string looks like this, e.g. Name123 but if you enter Name123Name than it doesn’t work?

Can’t understand why?

Any ideas?

Best regards,
Ilia

Answer 1

Your regular expression finds one character not in [0-9] at the end of the string.

To check if there is a digit anywhere in the string, remove the anchors:

/[0-9]/

To check that all characters are not digits, add a start of string anchor too:

/^[^0-9]+$/

This approach is called a blacklist – a list of characters you don’t want to allow. Note that it’s often better to create a whitelist instead – a list characters that you do want to allow.