On Mon, Jul 05, 2010 at 12:42:51PM +0200, Bret S. Lambert wrote:
> On Mon, Jul 05, 2010 at 06:35:01PM +0800, Aaron Lewis wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Hi,
> > echo %A3 | sed 's/(%[0-9A-Z]{2})//g'
> >
> > I'd like %A3 like string to be removed , what's wrong with my script ?
> >
>
> According to the sed manpage, it doesn't use {} in this way; you seem
> to be using the wrong syntax (although sed veterans can likely give a
> more thorough answer).
>
> try sed 's/%[0-9A-Z][0-9A-Z]//g' (minus any typos/thinkos on my part)
sed(1) uses basic regular expressions (see re_format(7) for
details). In particular, you should prepend with a backslash
the parentheses and braces in the original example, although
the parentheses are superfluous for the stated purpose. If
you want to use bounds, then
echo %A3 | sed 's/%[0-9A-Z]\{2\}//g'
will do.
