On Mon, 23 Aug 2010, Dennis Williamson wrote:
If you're writing a Bash-specific script then it's preferable to use
double square brackets (see http://mywiki.wooledge.org/BashFAQ/031).
if [[ -f $file ]]
then
do something
fi
I'd avoid non-portable syntax unless it offers a significant
advantage over standard syntax.
[[ ... ]] is not standard, and offers little over the standard
syntax.
--
Chris F.A. Johnson, <http://cfajohnson.com>
Author:
Pro Bash Programming: Scripting the GNU/Linux Shell (2009, Apress)
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
