commit: zshrc: using FOO=${FOO:-default} instead of (( ${+FOO} )) || FOO=default

[Frank Terbeck]

Changeset available online at:

http://hg.grml.org/grml-etc-core/rev/e77701968070dc524be94a6d006ab24f3b7dce63


changeset:   380:e77701968070dc524be94a6d006ab24f3b7dce63
tag:         tip
user:        Frank Terbeck <ft at grml.org>
date:        Sat Feb 02 10:41:09 2008 +0100
files:       etc/zsh/zshrc
description:
zshrc: using FOO=${FOO:-default} instead of (( ${+FOO} )) || FOO=default

This is more correct, IMHO.
The old way only sets the default if $FOO is unset; whereas the new way
sets the default if $FOO is unset *or* empty (which is certainly desirable,
if you think of variables like $PAGER).