Regular Expression To Match String Not Starting With Or Ending With Spaces

Question

I need a regular expression that makes sure a string does not start with or end with a space. I don\'t care if it has a space in the \"middle\" just not at the beginning or the

Answer 1

You use lookaround assertions, because they're zero-width:

^(?=\S).*(?<=\S)$

It might be better to use negative assertions and positive character classes, though:

^(?!\s).*(?<=\s)$