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Fabien wrote:
> If using alpha compilers gives you the heebie jeebies, you can also do
> something like this:
> function L(args)
>  return function(exp)
>    return assert(loadstring("return function("..args..")"
>      .." return "..exp.." end"))()
>  end
> end
You probably want to perform some compilation caching, indexing compiled
functions with their source, so that you keep acceptable performances when
lambdas occur in loops (i.e. virtually always).
A good point. That's a form of memoization. Is there a memoize module for Lua like the one in Perl? One can easily do it on demand for a particular function by hand, of course.

With kind regards Veli-Pekka Tätilä
Accessibility, Apps and Coding plus Synths and Music: