What is Science?

What is Science?

Posted Jun 30, 2012 8:44 UTC (Sat) by Cyberax (✭ supporter ✭, #52523)
In reply to: What is Science? by khim
Parent article: Why learn C? (O'Reilly Radar)

Uhm. Why classes are 'buzzword'? They are, like, 30 years old buzzword. In fact, even in languages like Java/C# architects now try to separate data from functionality (Fowler calls that 'anemic domain model'). And I don't understand that bit about 'useless abstractions'. For example, this kind of code:

std::function<void(int,int)> point_callback;

struct dist_summator
{
   Double dist;
   void add_point(double x, double y, double z)
   {
      dist+=sqrt(x*x+y*y+z*z);
   }
};

dist_summator sum;
point_callback=boost::bind(&dist_summator::add_point, &sum, _1, _2, 123.0d);
...
//Get points
...
//Use sum.dist

Is worse than something like this:

(void)(void*, int, int) point_callback;
void * point_callback_ctx;

typedef struct _dist_summator_with_fixed_z_ctx
{
   double sum;
   double fixed_z;
} dist_summator_with_fixed_z_ctx;
void sum_x_y(void *ctx_ptr, int x, int y)
{
   dist_summator_with_fixed_z_ctx *ctx=(dist_summator_with_fixed_z_ctx*)ctx;
   ctx->sum+=sqrt(x*x+y*y+ctx->z*ctx->z); //Whoopsie, forgot about ints here!   
}

dist_summator_with_fixed_z_ctx ctx;
point_callback = &sum_x_y;
point_callback_ctx = &ctx;
//Get points
...
//Use ctx.sum

---

(Log in to post comments)