Re: [Lua snippit] print_hex

["Patrick Donnelly" <batrick.donnelly () gmail com>]

On Sun, Sep 7, 2008 at 7:44 PM, Kris Katterjohn <katterjohn () gmail com> wrote:
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> Patrick Donnelly wrote:
> > That looks fine. I put the "out" local out of the function definition
> > to prevent the string from repeatedly being remade (numbers are
> > constant folded but not strings). I did this mainly to expose people
> > on the list to some good practices (among other things I did), even
> > though it probably won't make a huge difference in a debugging
> > function. If you moved it inside because you didn't want to clutter
> > the surrounding function (the file) with variables, you can surround
> > the print_hex function with do ... end to force scoping.
>
> I'm pretty sure Brandon, I and others have brought this up in the past, but it
> would be awesome to have a "Best Practices" section (short is fine) in the
> Nmap docs/book somewhere on Lua coding, and any gotchas that could get us who
> come from many other languages (I think most people here learned Lua solely
> for NSE... I know I did).  I know Brandon recently posted a link on learning
> Lua from a Perl background, but I've never been much of a Perl guy.
>
> And also anything we can do to make things more efficient.  I don't know how
> the Lua interpreter works wrt optimizations or whathaveyou, which is perhaps
> another good reason for having some docs on this.

I would do this if Fyodor asked me to (it may be out of the scope of
his book). I learned most of what I know from reading PiL (Programming
in Lua), the Lua Manual, and reading other's code.

Cheers,

-- 
-Patrick Donnelly

"One of the lessons of history is that nothing is often a good thing
to do and always a clever thing to say."

-Will Durant

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