Re: Another conversion to C or Java...

"Marco Minerva" <marco.minerva@xxxxxxxxxx> writes:

> Hi all!
>
> Excuse me, but I need another help translating a small piece of Lisp
> code to C or Java:
>
> (let ((prod (apply #'* probs)))
> (/ prod (+ prod (apply #'* (mapcar #'(lambda (x)
> (- 1 x))
> probs)))))
>
> Where "probs" is a list of the fifteen individual probabilities, i.e. a
> list of 15 numbers between 0 and 1.
>
> It's again from Paul Graham's spam algorithm...

#include <greenspun.h>
float one_minus_x(float x){return(1-x);}
float truc(cons_t* probs){
cons_t* prod=apply(mul,probs);
return(prod/(prod+apply(mul,mapcar(one_minus_x,probs))));}


--
__Pascal Bourguignon__ http://www.informatimago.com/
Until real software engineering is developed, the next best practice
is to develop with a dynamic system that has extreme late binding in
all aspects. The first system to really do this in an important way
is Lisp. -- Alan Kay
.

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