Re: sed

[Tzafrir Cohen <tzafrir@cohens.org.il>]

On Thu, Sep 18, 2008 at 09:06:54AM -0500, Matt Zagrabelny wrote:
> On Thu, 2008-09-18 at 14:29 +0100, michael wrote:
> > I've been struggling to get this to work but I think 'sed' should be
> > able to do it if I could just get some help with the correct
> > incantation...
> > 
> > 
> > given a file with many strings, include many of the form
> >   <a href="some url or other">www</a>
> > 
> > I wish each to be transformed to
> >   <a href="some url or other">some url or other</a>
> > 
> > ie so literal 'www' is replaced with the actual URL for each
> > occurance... 
> 
> Well, it's not 'sed' (I prefer the PCRE), but this perl script ought to
> get you off the ground.
> 
> #!/usr/bin/perl
> 
> use strict;
> 
> while (<>) {
>   chomp;
>   if (my ($url) = /<a href="([^"]*?)">www<\/a>/) {
>     print "<a href=\"$url\">$url</a>\n";
>   }
> }

That is:

  perl -p -e 's/<a href="([^"]*)">www<\/a>/<a href=\"$1\">$1<\/a>/'

But this one always prints, unlike yours that only prints if it has a
hit.


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