RFC: small syscons and kbd patch

[Erik Trulsson]

On Fri, Dec 05, 2008 at 12:35:31AM -0800, Garrett Cooper wrote:
> On Thu, Dec 4, 2008 at 11:22 PM, Ed Schouten <ed at 80386.nl> wrote:
> > * Maksim Yevmenkin <maksim.yevmenkin at gmail.com> wrote:
> >> the idea was to ensure that kbd->kb_locked variable only takes values
> >> 0 (zero) and 1 (one).
> >
> > I often use constructs like these to do that:
> >
> >        foo = bar ? 1 : 0;
> >
> > Maybe !!bar is a lot shorter to write, I think the line above is a lot
> > easier to read.
> 
> Indeed. I had no idea (and I would assume that many people wouldn't in
> my similar level of systems programming) what in the work you were
> trying to do above with that line. The one-line conditional is
> universal in almost all major high-level language dialects I've hit,
> minus Python and Tcl.
> -Garrett

The !!bar construction to map {0, not-0} to {0,1} is fairly common in C
programming, and I would certainly expect any experienced C programmer to
recognize it.




-- 
<Insert your favourite quote here.>
Erik Trulsson
ertr1013 at student.uu.se