Date:         Thu, 29 Nov 2007 21:20:43 -0600
Reply-To:     "data _null_," <datanull@GMAIL.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "data _null_," <datanull@GMAIL.COM>
Subject:      Re: End of string bug in regular expression?
Comments: To: Alex <internalsu@hotmail.com>
In-Reply-To:  <53d42045-1e8a-4c5f-86b5-50b9093065bb@s8g2000prg.googlegroups.com>
Content-Type: text/plain; charset=ISO-8859-1

I don't have SAS this evening so I cannot provide code.  The LENGTH
function returns the "trimmed" length of a string.  Compare that to
the VLENGTH function that returns the length of the variable.  Notice
that x = 'a/b/d/d.java ' in the code I posted has one trailing space
at the end.  In the case VLENGTH(x) eq LENGTH(X)+1.

On Nov 29, 2007 8:37 PM, Alex <internalsu@hotmail.com> wrote:
> On Nov 29, 12:11 pm, datan...@GMAIL.COM ("data _null_,") wrote:
> > Not a bug.
> >
> > Okay I'll put it in a program.  You need to learn about fix length
> > character strings.  Its a SAS thing.
> >
> > 266  data _null_;
> > 267     do x = 'a/b/c/d.java ';
> > 268        y  = prxmatch('/[\\\/]?([^\s]+[\\\/])*([\w.]+)[.](\w+)/',x);
> > 269        z  = prxmatch('/[\\\/]?([^\s]+[\\\/])*([\w.]+)[.](\w+)$/',x);
> > 270        zT  = prxmatch('/[\\\/]?([^\s]+[\\\/])*([\w.]+)[.](\w+)$/',trim(x));
> > 271        put (_all_)(=);
> > 272        end;
> > 273     run;
> >
> > x=a/b/c/d.java y=1 z=0 zT=1
> >
> > On Nov 28, 2007 9:34 PM, Alex <interna...@hotmail.com> wrote:
> >
> >
> >
> > > a/b/c/d.java
> >
> > > to match it, prxmatch returns true with
> >
> > > [\\\/]?([^\s]+[\\\/])*([\w.]+)[.](\w+)
> >
> > > but false with [\\\/]?([^\s]+[\\\/])*([\w.]+)[.](\w+)$
> >
> > > in other perl lib, the $ returns true as well.- Hide quoted text -
> >
> > - Show quoted text -
>
> My program is a little bit long. The string to match is from another
> dataset. Like you all said, the magic is to trim before matching. But
> I have tested every string, its length shows there's no blanks after.
> So I don't know why the trim helps here?
>