interface

问题 So going back to basics, I'm trying to wrap my head around vtables and whatnot. In the following example, if I were to, say, pass a B* to some function, how does that function know to call the methods in the vtable of the C object instead of the methods from the vtable of A ? Are there two, separate VTables that are passed to that object? Are interface pointers really just vtables (since interfaces, IIRC, cannot contain property declarations)? What I'm trying to say is, up until I actually

问题 So going back to basics, I'm trying to wrap my head around vtables and whatnot. In the following example, if I were to, say, pass a B* to some function, how does that function know to call the methods in the vtable of the C object instead of the methods from the vtable of A ? Are there two, separate VTables that are passed to that object? Are interface pointers really just vtables (since interfaces, IIRC, cannot contain property declarations)? What I'm trying to say is, up until I actually

问题 I'd like to achieve the glow effect on what I believe are UILabels (or maybe a custom control?) in this application called convert. I think the app looks pretty neat and I'm trying to achieve a similar effect for my own application Any help? Best regards david alt text http://www.davidhomes.net/convert.png 回答1: The applicatin seems to have the glow effect only for numbers. That's 10 digits plus a few symbols (".", "+", "-", etc). An easy way to achieve this is to have a different image for

问题 I have an interface class that looks like this. public interface Species { String name(); } And a Human class that implements @AutoValue with a TypeAdapter. @AutoValue public abstract class Human implements Parcelable, Species { public static Human create(String humanVariable) { return new AutoValue_Human(humanVariable); } public static Human create(String name, String humanVariable) { return new AutoValue_Human(name, humanVariable); } public static TypeAdapter<Human> typeAdapter(Gson gson) {

问题 I'm in the process of learning Go and the documentation and interactive lessons say that an empty interface can hold any type, as it requires no additionally implemented methods. So for an example: func describe(i interace{}) { fmt.Printf("Type: %T | Value: %v\n", i, i) } ...would print out... "Type: int | Value: 5" // for i := 5 "Type: string | Value: test" // for i := "test" ... etc So I guess my question is if this is Go's way of implementing generic functions or if there is another, more

问题 I'm in the process of learning Go and the documentation and interactive lessons say that an empty interface can hold any type, as it requires no additionally implemented methods. So for an example: func describe(i interace{}) { fmt.Printf("Type: %T | Value: %v\n", i, i) } ...would print out... "Type: int | Value: 5" // for i := 5 "Type: string | Value: test" // for i := "test" ... etc So I guess my question is if this is Go's way of implementing generic functions or if there is another, more

问题 I have problem with List<T>.Reverse() and Reverse(this IEnumerable<TSource> source) . Look to the code: // Part 1 List<int> list = new List<int> { 1, 2, 3 }; foreach (int x in list) Console.Write(x); Console.WriteLine(); list.Reverse(); foreach (int x in list) Console.Write(x); Console.WriteLine(); list.Reverse(); // Part2 IList<int> ilist = list; foreach (int x in list) Console.Write(x); Console.WriteLine(); ilist.Reverse(); foreach (int x in ilist) Console.Write(x); Console.WriteLine();

问题 I'm reading through two articles right now and am a little confused. This article - http://blog.golang.org/laws-of-reflection says > var r io.Reader tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0) if err != nil { return nil, err } r = tty r contains, schematically, the (value, type) pair, (tty, *os.File). Notice that the type *os.File implements methods other than Read; even though the interface value provides access only to the Read method, the value inside carries all the type information

问题 I have a project and I'm required to produce the class and sequence diagram. It is a procurement website. My only problem is that I don't know how to associate the web pages (user interfaces) to these diagrams. If they are not needed what is the right way for me to include it in the diagrams because from a book I read there are "UserInterface" classes, so another question, what should be inside of these UI classes.Can someone give me an example. Thanks! 回答1: There are several levels of

问题 I have a project and I'm required to produce the class and sequence diagram. It is a procurement website. My only problem is that I don't know how to associate the web pages (user interfaces) to these diagrams. If they are not needed what is the right way for me to include it in the diagrams because from a book I read there are "UserInterface" classes, so another question, what should be inside of these UI classes.Can someone give me an example. Thanks! 回答1: There are several levels of