Re: [ANN] enjoy 1.0 ( an exercise of Lua as a DSL)

[HyperHacker <hyperhacker@...>]

On Mon, Jan 31, 2011 at 17:27, Steve Litt <slitt@troubleshooters.com> wrote:
> On Monday 31 January 2011 18:37:26 Lucas Zawacki wrote:
>> Hey guys!
>>
>> So I've been working in the past few days in a little app to put some
>> of my Lua skills in practice and scractch a little itch I had.
>>
>> Check it out: https://github.com/lfzawacki/enjoy . There's some
>> documentation and honesty in the README
>>
>> It's a small application to read joystick inputs and map it to OS
>> shell commands. It uses Lua extensively as a DSL for the mapping of
>> buttons to commands, I have no parsers at all... just plain Lua.
>> The code has been lualinted and still has some "warnings" (some global
>> variables that I plan to squash while learning more about environments
>> and the registry). The design is VERY simple and naive, but it works
>> fine and I'm cheating here and calling this a 1.0 release. It uses the
>> Linux kernel API to read the joystick (because I'm lazy) so it works
>> only under Linux, BUT I plan in fixing that
>
> I'm all over this like a squirrel on a tree. This is excellent. But I own no
> joystick. How would I make this work with my scroll mouse instead? Would I
> just change
>
> int fd = openDevice( argc == 2 ? strdup(argv[1]) : "/dev/input/js0" );
>
> to something else? Using tail -f I couldn't read anything off of
> /dev/input/mouse0.
>
> Also, I didn't understand one piece of Lua syntax:
>
> cmd {
>                down = function ()
>                        print(k .. ' down')
>                        execute_cmd('xdotool keydown ' .. k)
>                        --__send_key_event(k,true)
>                end ,
>                up = function()
>                        print(k .. ' up')
>                        execute_cmd('xdotool keyup ' .. k)
>                        --__send_key_event(k,false)
>                end
>        }
>
> Since cmd is a function, shouldn't the anonymous table be enclosed in
> parentheses?
>
> This is pretty cool. Thanks
>
> SteveT
>
> Steve Litt
> Recession Relief Package
> http://www.recession-relief.US
> Twitter: http://www.twitter.com/stevelitt
>
>
>

Not necessary. f{} == f({}). Also for strings: f"a" == f("a") (and
again for f'a' and f[[a]]).

-- 
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