2014/11/25 15:56、tre...@india.com のメール：
a = `{ls file}^test; echo 'this part is not executed if file doesn''t exist'
probably your question is as follows:
maia% a = `{ls file}^test; echo 'this part is not executed if file doesn''t
exist'
ls: file: 'file' directory entry not found
rc: null
It's a null list not a null string. You can use a null string:
% s=''
% ls $s^/x
but not a null list (like using null in many lisp list operations, or the
difference between strcat of nil and strcat of ):
% s=()
% ls $s^/x
rc (-/bin/rc): null list in concatenation
A completely unset variable
I think it is very realistic. They modified standard bsd
stack (I don't know its present state but back when I worked
on it, it needed to be simplified quite a bit).
i think a no lock tcp stack from 1990 hacked to be even less sophisticated is
anything
but realistic. it's pure fantasy that
I haven't looked into why on the RPi plan9's tcp performance
is about 30-40% of that on linux (which works near wire speed).
For the local case it doesn't matter much in any case.
(a) allocb() relies on deathly slow malloc; cf. qallocb in 9atom, which upps
performance quite a bit
(b)
On Nov 25, 2014, at 1:59 , Bakul Shah ba...@bitblocks.com wrote:
As long as you run IP, you pay the other costs for any protocol.
But there's plenty of cases where you don't need even that. See AOE, or nonet
from very early Plan 9. I'd like that back.
If you use TCP you benefit from its near
On Tue Nov 25 08:52:33 EST 2014, a...@9srv.net wrote:
On Nov 25, 2014, at 1:59 , Bakul Shah ba...@bitblocks.com wrote:
As long as you run IP, you pay the other costs for any protocol.
But there's plenty of cases where you don't need even that. See AOE, or nonet
from very early Plan 9.
Also, when the '^' is omitted, like in
$dir(1)^$dir(2)
Also, when the '^' is omitted, like in
$dir(1)$dir(2)
Sorry for the mess...
Sorry for all that noise. The problem was simply confusion about strings,
list of strings, list of strings and|or other list of strings... and
too much coffee.
What I needed was simply the use of $ to work around possible empty
lists in concatenations (and of course read the man page carefully
