[ale] BASHing my head

[Ted W.]

I've always heard that you should use find in place of ls when the
output must be parsed. In this case, find handles it all by itself.

  elw at xbook:~/test$ touch a.out A.out b.out B.out c.out C.out
  elw at xbook:~/test$ find . -name "[A-Z]*.out"
  ./A.out
  ./B.out
  ./C.out
  elw at xbook:~/test$ find . -name "[a-z]*.out"
  ./a.out
  ./b.out
  ./c.out

On Wed, Aug 26, 2015 at 06:23:06PM -0400, DJ-Pfulio wrote:
> I seem to recall being told to NEVER parse the output from ls - ever.
> Maybe I misunderstood?
> 
> On 08/26/2015 05:38 PM, Jim Kinney wrote:
> > Yeah. What he said.
> > From my F22 bash-land (4.3.39):
> > touch a.pdf A.pdf b.pdf B.pdf c.pdf C.pdf z.pdf Z.pdf
> > [jkinney at dhcp061167 tmp]$ ls
> > a.pdf  A.pdf  b.pdf  B.pdf  c.pdf  C.pdf  z.pdf  Z.pdf
> > [jkinney at dhcp061167 tmp]$ ls | grep "[A-Z].pdf"
> > A.pdf
> > B.pdf
> > C.pdf
> > Z.pdf
> > [jkinney at dhcp061167 tmp]$ ls | grep "[a-z].pdf"
> > a.pdf
> > b.pdf
> > c.pdf
> > z.pdf
> > On Wed, 2015-08-26 at 15:41 -0400, Ed Cashin wrote:
> >> I've been biting my tongue here.  I don't think these characteristics
> >> of bash are congruent with UNIX philosophy.  The people who made UNIX
> >> complain about bash being bloated.  These characteristics of bash are
> >> congruent with POSIX philosophy.
> >>
> >> A UNIX-ish way of doing this would be ...
> >>
> >>   ls | grep '^[A-Z].*\.pdf'
> >>
> >>
> >> On Wed, Aug 26, 2015 at 1:41 PM, Jim Kinney <jim.kinney at gmail.com>
> >> wrote:
> >>> Wow! Shopt has enough options to make it stand next to emacs.
> >>> I don't understand why the default is essentially case insensitive
> >>> when everything else in bash is case sensitive. It looks like the
> >>> LANG makes it work that way but that makes no sense either to me. A
> >>> != a in standard US English.
> >>> More of the secret mysteries of Unix philosophy I've never wrapped
> >>> my head around.
> >>> On Aug 26, 2015 12:16 PM, "Scott Plante" <splante at insightsys.com>
> >>> wrote:
> >>>> I didn't know the globasciiranges option.
> >>>>
> >>>> Another solution is the LC_COLLATE variable:
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo

-- 
Ted Wood <ted-lists at xy0.org>
Registered GNU/Linux user #413569