Re: help with lua style and syntax
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- Subject: Re: help with lua style and syntax
- From: "David Collier" <myshkin@...>
- Date: 2012年10月18日 14:43 +0100 (BST)
> *From:* "Joshua Phillips" <jp.sittingduck@gmail.com>
> *To:* "Lua mailing list" <lua-l@lists.lua.org>
> *Date:* 2012年10月18日 13:45:14 +0100
>
...
> No it isn't.
well I'm finding myself writing:
do
local localRs485SerialInstanceOpened
localRs485SerialInstanceOpened, localRs485SerialInstance
= openSerialInstance(localRs485DeviceName)
if not localRs485SerialInstanceOpened
then
print("program exiting - can't open local RS485 serial port "
..localRs485DeviceName)
return
end
end
when I could write
if( not( opened, localRs485SerialInstance =
openSerialInstance(localRs485DeviceName))
then
print("program exiting - can't open local RS485 serial port
"..localRs485DeviceName)
return
end
I think the 2nd is more elegant.
>
> > Now Lua allows me to return more than one value, so I can write
> >
> > passed, z = myFunction(x, y)
> >
> > but is there any way in Lua I can write
> >
> > if passed, z = myFunction(x, y)
> >
> > and set both passed and z, but then test 'passed' ??
>
> No, thankfully.
>
> > It would allow me to do:
> >
> > if ( passed, z = myFunction(x, y) )
> > and ( passed, q = mySecondFunction(z) )
> > and ( passed, result = myThirdFunction(q) )
> >
> > which is a lot more comapct than what I'm writing at present.
>
> Compact, maybe. It's much better to make software easy to read, and
> that
> doesn't necessarily mean making it compact.
>
> See also: Perl golf.
>
>