Re: [dwm] dwm with dzen status bar

pancake <pancake_AT_youterm.com> writes:

> On Thu, 2008-07-03 at 14:59 +0200, Oliver Heins wrote:
>> Hi Hugo.
>> | ~$ time (n=0; for i in {1000..1}; do n=$(($n+$i)); done; echo $n)
>>
>> I don't know if arithmetic evaluation is a bashism, but I think the
>> costs for using bc are quite high. However, I the let syntax (e.g.,
>> »let "n = n +i"«) should work with all posix-shells and therefore be
>> portable.
>
> its posix. the fork is also expensive, not only bc.
>
> 'let' is a bashism i think. shouldnt be used imho.

Perhaps I'm misguided by
http://publib.boulder.ibm.com/infocenter/systems/topic/com.ibm.aix.baseadmn/doc/baseadmndita/korn_shell_arith_eval.htm

This site is about the korn shell, which is the standard posix shell.

There it's said, »The Korn shell or POSIX shell includes an alternative
form of the let command if only a single expression is to be evaluated.«

That alternative form is like ((x = x / 3)), and it's limited.

Best regards,
 olli

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