Groups | Search | Server Info | Login | Register

Groups > comp.unix.misc > #63

Re: unset, set variables, and arithmetic and other options

Cross-posted to 2 groups.

Followups directed to: comp.unix.shell

Show all headers | View raw

["Followup-To:" header set to comp.unix.shell.]
On 2012-02-27, Geoff Clare <geoff@clare.See-My-Signature.invalid> wrote:
> Janis Papanagnou wrote:
>
>> Unset and empty are not the same, as shown. There are contexts where
>> the difference don't matter, though; e.g. if you expand the variables
>> to obtain their value, which is in both cases just empty.
>
> Unless "set -u" is in effect.

+1

A darn good idea for any non-throwaway script longer than half a page.

Back to comp.unix.misc | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

unset, set variables, and arithmetic and other options Beta What <lite.on.beta@gmail.com> - 2012-02-25 22:46 -0800
  Re: unset, set variables, and arithmetic and other options Ivan Shmakov <oneingray@gmail.com> - 2012-02-26 14:55 +0700
    Re: unset, set variables, and arithmetic and other options Beta What <lite.on.beta@gmail.com> - 2012-02-26 00:18 -0800
      Re: unset, set variables, and arithmetic and other options Janis Papanagnou <janis_papanagnou@hotmail.com> - 2012-02-26 10:59 +0100
        Re: unset, set variables, and arithmetic and other options Geoff Clare <geoff@clare.See-My-Signature.invalid> - 2012-02-27 13:14 +0000
          Re: unset, set variables, and arithmetic and other options Kaz Kylheku <kaz@kylheku.com> - 2012-02-27 13:42 +0000
  Re: unset, set variables, and arithmetic and other options John McCue <jmccue@jmclin0.hsd1.ma.comcast.net> - 2012-02-26 16:20 +0000

csiph-web