On Mon, 28 Jul 2008 23:44:13 +0200
Xavier <[EMAIL PROTECTED]> wrote:
> Anyway, I have something else, look :
> [EMAIL PROTECTED] ~]$ array=('' {foo,bar,baz})
> [EMAIL PROTECTED] ~]$ [ -z "[EMAIL PROTECTED]" ] || echo array not empty
> bash: [: too many arguments
> array not empty
> [EMAIL PROTECTED] ~]$ [ -z "${array[*]}" ] || echo array not empty
> array not empty
>
> I never understood what the differences between @ and * were though...
>
The way I understand it "[EMAIL PROTECTED]" is expanded to "foo" "bar" "baz",
while "${array[*]}" is expanded to "foo%bar%baz" where % is the first
character of $IFS (meaning ' ' if not set otherwise).
So with @ you get several words for the test, which would explain the
observed behaviour.
Interestingly enough [[ -z "[EMAIL PROTECTED]" ]] seems to work as well...
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