interface

问题 I am using Python 3.1.1 on Mac OS X 10.6.2 and need an interface to R. When browsing the internet I found out about RPy. Is this the right choice? Currently, a program in Python computes a distance matrix and, stores it in a file. I invoke R separately in an interactive way and read in the matrix for cluster analysis. In order to simplify computation one could prepare a script file for R then call it from Python and read back the results. Since I am new to Python, I would not like to go back

问题 I am trying to resume a download that has failed due to internet failure. The function I am using to check the success of a curl download is: curl_multi_info_read This function returns the proper error code ( CURLE_COULDNT_CONNECT ) when it is called the first time when internet has lost. If I try to call it again, it returns NULL pointer which means no messages. Actually, I am using the return error code to check whether internet connection is present or not. This is troubling me as it doesn

问题 I am relatively new to Java Programming and I came across this declaration of an interface and a class that implements it: public interface Abcd<E extends Comparable<E>>{ ...... ...... ...... } public class AbcdImpl<E extends Comparable<E>> implements Abcd<E>{ ...... ...... ...... } Can you explain what <E extends Comparable<E>> stands for and typically what does <E> signify? 回答1: E stand for a type, the letter doesn't need to be E it can be anything, but usually people will use letters like

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I've been a software developer (mainly Visual Studio) for many years and have been working with Objective C and Cocoa for some months now. I have a good handle now on the language and the frameworks but one thing I need to work on is interface design, more specifically custom views and tables. There is a lot of

问题 Background: In the spirit of "program to an interface, not an implementation" and Haskell type classes, and as a coding experiment, I am thinking about what it would mean to create an API that is principally founded on the combination of interfaces and extension methods. I have two guidelines in mind: Avoid class inheritance whenever possible. Interfaces should be implemented as sealed class es. (This is for two reasons: First, because subclassing raises some nasty questions about how to

问题 Oftentimes when browsing code, I'll come across something like this: public class Fruity { private IOrange _Orange; public Fruity() { _Orange = new Orange() as IOrange; } public void PrepareFruit() { return _Orange.Peel(); } } Great, so now I want to see how the Peel method is implemented. Right-clicking on the method gives me Go To Definition which takes me to the interface stub. OK, strictly speaking, the definition is ascribed by the interface given that the private variable is defined in

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . I am working with several developers who develop .net components for me. I manage the licensing mechanism and want to hide the implementation. I would like to just provide them the interface, with for example the methodIsLicenseValid() so they must use it in the code but cannot

问题 Can anyone point me to a tutorial on how to create an outlook like interface in WPF? Thanks 回答1: You can find it here. Note that you could have easily found this yourself with the aid of Google. 来源： https://stackoverflow.com/questions/594506/wpf-outlook-like-interface

问题 I have the following GameObject interface : public interface GameObject { void viewDetails(); } Character Interface : interface Character{ void pickUp(Weapon weapon); void use(Weapon weapon); } and abstract Weapon class : public abstract class Weapon implements GameObject { //left out constructor to focus on methods @Override public abstract void viewDetails(); public abstract void attack(Enemy enemyObj); //Could be bullets, could be a mystical item. public abstract void replenish

问题 I have a program whose default UI is a ViewPager with a TabLayout . The MainActivity is a CoordinatorLayout . The Viewpager , AppBarLayout , and TabLayout are all wrapped in a RelativeLayout that I intend to use as a container for swapping the main UI out for a different view. Hosted in one of the ViewPager views is a button. This button communicates with MainActivity via an interface called HelperLinkerListener , which the MainActivity implements. I know that the interface is wired up