Re: Incorporating (( $+commands[foo] )) into a larger "if" statement

[René Neumann <lists@xxxxxxxxx>]

Am 06.08.2015 um 16:57 schrieb Bart Schaefer:
> On Aug 6,  7:53am, id5 wrote:
> }
> } if [[ (( $+commands[foo] )) && ... ]]; then
> }   echo yes
> } fi
> 
> That doesn't work.  [[ (( ... )) ]] is only parsed at all because you
> are allowed to have parenthesized subexpressions inside [[ ]], it is
> not interpreted as math in that context.

Ah, I see. I tested it beforehand, but it turned out it just seemed to
work, because in the end [[ non_empty_string ]] is true. Thanks for
pointing this out.

> I suspect you meant
> 
>     if (( $+commands[foo] )) && [[ ... ]]; then

Yes. Though this variant looks somewhat odd, as one is mixing (( )) and
[[ ]] in one chain...

> Aside:  You somehow posted your reply with "From: id5" (no domain name in
> the email address).  You should fix that.

Mhm, seems like my TB-Identities-Plugin was broken. Should be fixed now,
hopefully.

- René