При использовании подробной формы синтаксиса код будет подробным. Вот альтернатива:
List<Tag> result =
db.Tags
.GroupBy(t => t.Tag)
.Select(g => new {Tag = g.Key, Frequency = g.Count()})
.OrderByDescending(t => t.Frequency)
.Take(25)
.ToList()
.Select(t => new Tag(){Tag = t.Tag, Frequency = t.Frequency})
.ToList();
Try using a typedef:
typedef void (*SDLEventFunction)(SDL_Event *);
std::vector<SDLEventFunction> functions;
If you like boost then then you could do it like this:
#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <vector>
void f1(SDL_Event *event)
{
// ...
}
void f2(SDL_Event *event)
{
// ...
}
int main()
{
std::vector<boost::function<void(SDL_Event*)> > functions;
functions.push_back(boost::bind(&f1, _1));
functions.push_back(boost::bind(&f2, _1));
// invoke like this:
SDL_Event * event1 = 0; // you should probably use
// something better than 0 though..
functions[0](event1);
return 0;
}
Try this:
std::vector<void ( *)( SDL_Event *)> functions;