Re: autoload variables

["René Neumann" <lists@necoro.eu>]

Am 30.08.21 um 18:57 schrieb Anthony Fletcher:
> On Mon, 30 Aug 2021 at 12:40, René Neumann <lists@necoro.eu> wrote:
>>
>> Is there a reason you need this as a variable? Would a function
>>
>> upif() { ip -4 r | ... }
>>
>> not suffice?
>>
>> - René
>>
> 
> A function would work but then you need to run it every time to get the
> same value..... and of course the variable is for other commands. Thus
>         systemcommand $(upif)
> In this particular case anything to do with the uplink interface (eg
> dump_dhcp6). I guess the function could cache the result for speed.
> 

As always: the tradeoff between having everything loaded "just in case" 
vs the "doing extra work when I need it".

In my eyes, it heavily depends on the use cases: When you write, "I need 
it (only) when debugging networks", I hear "once in a blue moon" and 
would argue that any discussion about speed is wasted time (i.e. well, 
let it recalc the value each of the four times a month one needs it).
But you also might be someone for whom "debugging networks" is part of 
the job, which of course shifts the focus a lot...