Posted by HaggMan on 12/01/97 11:56

Thank you to both of you! I'll try them out tonight.

_hello_world_ should match "hello" but not "world_" though it should
technically *never be used that way in what I'm doing.

Chung Leong wrote:
> HaggMan wrote:
> > I'm trying to get the regular expression which matches text between two
> > underscores:
> > _MATCHTHIS_
> >
> > The problem is, I don't want to match it if the only thing in between
> > the underscores are spaces or other underscores:
> > _ _ _
> > (this should get no match)
> >
> > _hello world_
> > (this should match "hello world" even though there's a space because
> > there's also things besides a space and underscore)
> >
> > Right now, I've got this:
> > /_([^_]+?)_/ which does well at excluding _
> >
> > I've also tried this:
> > /_([^_\s]+?)_/ which does well if there are NO spaces between the _'s.
> > ie:
> > _hello_
> > (correctly matches "hello")
> > _hello world_
> > (does not match "hello world" as I would like)
> > _ _ _
> > (correctly does not match this)
> >
> > I'm stumped. Any help?
>
> Is _hello_world_ a match or not? The following pattern might be what
> you need:
>
> /\b_\B(.+?)\B_\b/
>
> Boundary conditions are used here instead of conditions on what's
> inside.

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