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Re: Negative offset with variable expansion doesn't work
From: |
Paul Jarc |
Subject: |
Re: Negative offset with variable expansion doesn't work |
Date: |
Tue, 21 May 2002 11:31:11 -0400 |
User-agent: |
Gnus/5.090007 (Oort Gnus v0.07) Emacs/21.2 (i686-pc-linux-gnu) |
Chet Ramey <chet@nike.ins.cwru.edu> wrote:
>> echo ${var:-2:2}
>
> Of course. The `:-' doesn't specify a negative offset.
But this is an easy mistake to make, given the text of the man page.
It would be helpful to mention that a negative value should be
parenthesized, or preceded by a space, or otherwise distinguished from
the :- case.
paul