[pdftex] Ruby in TeX II.

[Nagy Bence]

> I prefer to get 6.0 Euro rather than 6.0pt.
> 
> Why do you put the result into a dimension register?  Wouldn't it be
> much more flexible, more convenient and much more general to put the
> output into a token register?
> 
>    \newtoks\testtoks
>    \rubycalc\testtoks{3*2}
>    \the\testtoks
> 
>    Output (\the\testtoks causes):
> 
>    6.0
> 
> No need then to strip the "pt" and you have arbitrary resolution.  And
> I can probably even get my 6.0 Euro.

The dimen gaved back by \rubycalc is a true TeX dimension, so you can
use it like this example (which makes a hbox with width of the 2/3 part
of bodywidth and rightmargin):

\rubycalc\testdimen{(\value\paperwidth-\value\leftmargin)/2.0*3}
\hbox to \testdimen{bla-bla-bla}

Try \rubyexec which gives back a string so "\rubyexec{(3*2).to_s} Euro"
writes "6 Euro" out without using any token registers.

Greetings,

Bence