[ale] who is the fastest bash scripter?

[Michael D. Hirsch]

On Tuesday 25 February 2003 08:05 pm, David S. Jackson wrote:
> On Tue, Feb 25, 2003 at 11:44:45AM -0500 Jason Day 
<jasonday at worldnet.att.net> wrote:
> > On Tue, Feb 25, 2003 at 10:39:20AM -0500, Michael D. Hirsch wrote:
> > > On Monday 24 February 2003 06:00 pm, David S. Jackson wrote:
> > > > You know, you're calling an extra echo command and doing a
> > > > conditional check (&&) when all you need to do is tell grep to
> > > > include the filename in its printout.  (See the -H switch in man
> > > > grep.)  No need to call any other utilities or spawn any other
> > > > processes.
> > >
> > > This doesn't sound right to me.  Since grep is reading from stdin in
> > > these scripts it can't possibly know the name of the file.
> >
> > You're right.  I knew there was something wrong with using the -H
> > switch in this circumstance, but I never went back and investigated
> > why after David's post.  Also, if you don't care about grep's output,
> > you can redirect it to /dev/null, and just get the name of the jar
> > file.
> >
> > Then again, if that's what you want, you could just do "grep -H
> > *.jar".
>
> Woops.  Sorry guys.  Forgot about STDIN there.  :-\
>
> How about just using zgrep instead of calling tar or gunzip or whatever?
>
> zgrep -H <classname> *.jar

Cool.  I learned another new command, today.  Thanks!

Michael
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