How do I recognize strings that do not end with a slash character ('/') using a regex?

Question

How can i match a string that does not finish with / . I know I can do that /\\/$/ and it will match if string does finish with /, but

Answer 1

You can use a negative character class:

/[^\/]$/

This however requires that the string contains at least one character. If you also want to allow the empty string you can use an alternation:

/[^\/]$|^$/

A different approach is to use a negative lookbehind but note that many popular regular expression engines do not support lookbehinds:

/(?