import system'collections;
import system'routines;
import extensions;

public program()
{
    var partial := (afs,af => (s => afs(af, s)));

    var fs := (f,s => s.selectBy:(x => f(x)).summarize(new ArrayList()).toArray());
    var f1 := (x => x * 2);
    var f2 := (x => x * x);

    var fsf1 := partial(fs, f1);
    var fsf2 := partial(fs, f2);

    console.printLine(fsf1(new int[]::(2,4,6,8)).toString());
    console.printLine(fsf2(new int[]::(2,4,6,8)).toString())
}