[ale] BASHing my head

[Jim Kinney]

I've not heard that but ls output can be a challenge. Parsing ls -A1 is fun.

On August 26, 2015 6:23:06 PM EDT, DJ-Pfulio <DJPfulio at jdpfu.com> 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

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.ale.org/pipermail/ale/attachments/20150827/511aebf3/attachment.html>