Working with variables in Lua(TeX)

Working with variables in Lua(TeX)

[Jaroslav Hajtmar]

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Hello,
I am sorry, I am novice in this maillist and in Lua(TeX) too. I dont 
know if my problem isn't off topic.
My inquiry is here: Is it make possible with variables in Lua(TeX) do 
for similar "hara-kiri" like in Perl or PHP by this example?:

$a="b";
$$a="456";
print $b; # result 456

$varname="counter";
$varindex=1;
${"$varname$varindex"}=123;
print $counter1; # result 123

Is any alternative of this examples in Lua what should be  using in LuaTex??

thanks  Jaroslav Hajtmar


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Re: Working with variables in Lua(TeX)

[Taco Hoekwater]

Jaroslav Hajtmar wrote:
> Hello,
> I am sorry, I am novice in this maillist and in Lua(TeX) too. I dont 
> know if my problem isn't off topic.
> My inquiry is here: Is it make possible with variables in Lua(TeX) do 
> for similar "hara-kiri" like in Perl or PHP by this example?:
> 
> $a="b";
> $$a="456";
> print $b; # result 456

There is no symbol dereferencing in lua. This is a good thing(tm),
in my opinion. If you want trickery like this, you have to resort
to loadstring (which is the lua equivalent of eval)

Best wishes,
Taco
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Re: Working with variables in Lua(TeX)

[Peter Münster]

On Fri, Mar 19 2010, Jaroslav Hajtmar wrote:

> $a="b";
> $$a="456";
> print $b; # result 456

No problem with tables:

testtab = {}
testtab.a = "b"
testtab[testtab.a] = 456
print(testtab.b)   -- result 456

Documentation about lua is here: http://www.lua.org/

Cheers, Peter

-- 
Contact information: http://pmrb.free.fr/contact/


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