methods

问题 class One { void foo() { } } class Two extends One { private void foo() { /* more code here */ } } Why is the above snippet of code wrong? 回答1: I'm going to try to incorporate the ideas from the other answers to come up with a single answer. First off, let's take a look at what's going on in the code. A look at the code The One class has a package-private foo method: class One { // The lack of an access modifier means the method is package-private. void foo() { } } The Two class which

问题 Method calls can usually omit the receiver and the parentheses for the arguments: def foo; "foo" end foo # => "foo" In the case above, foo is ambiguous between method call and reference to a potential local variable. In the absence of the latter, it is interpreted as a method call. However, when the method name can in principle be a constant name (i.e., when it starts with a capital letter, and consists only of letters), it seems to need disambiguation. def Foo; "Foo" end Foo # => NameError:

问题 Suppose I have a big program that consists of hundreds of methods in it. And according to the nature of input the program flow is getting changed. Think I want to make a change to the original flow. And it is big hassle to find call hierarchy/ references and understand the flow. Do I have any solution for this within Eclipse? Or a plugin? As an example, I just need a Log of method names that is in order of time. Then I don't need to worry about the methods that are not relevant with my "given

问题 Having this class : class Automat { private: // some members ... public: Automat(); ~Automat(); void addQ(string& newQ) ; void addCharacter(char& newChar) ; void addLamda(Lamda& newLamda) ; void setStartSituation(string& startQ) ; void addAccQ(string& newQ) ; bool checkWord(string& wordToCheck) ; friend istream& operator >> (istream &isInput, Automat &newAutomat); string& getSituation(string& startSituation) ; }; And also class called Menu which has the follow method : void Menu:

问题 I'm trying to create an interface to a common class, but the implementation classes can have different parameters. e.g. public interface IViewModel { //... void ResetReferences(); } // and then, in my class implementations, something like this: public class LocationViewModel : IViewModel { public void ResetReferences(List<StateProvinces> stateProvinces) //... } public class ProductViewModel : IViewModel { public void ResetReferences(List<Color> colors, List<Size> sizes) //... } So notice that

问题 I have a method lets say: private static String drawCellValue( int maxCellLength, String cellValue, String align) { } and as you can notice, I have a parameter called align. Inside this method I'm going to have some if condition on whether the value is a 'left' or 'right'.. setting the parameter as String, obviously I can pass any string value.. I would like to know if it's possible to have an Enum value as a method parameter, and if so, how? Just in case someone thinks about this; I thought

问题 I'm looking for a pythonic solution on how to store a method which is called on an object right inside the object. Because in python, if I want to catch for example the abs() method, I will overload this operator like: Catcher(object): def __abs__(self): self.function = abs c = Catcher() abs(c) # Now c.function stores 'abs' as it was called on c If I want to catch a function, which have an other attribute in it, for example pow() , I'm going to use this: Catcher(object): def __pow__(self,

问题 First, I am an android rookie, so my solution ways can be found awkward, and i am open to suggestions. I am trying to create a game manager object that handles all transitions between activities. And my purpose is that while in an activity, menuOut method will call the changeActivity method of GameManager object with nextActivity argument and changeActivity will start that Activity. I am getting errors consistently, and did not find a solution. Here is my source codes: GameManager: public

问题 I'm trying to call a method using a string, but there a problem: void make_moviment(string mov,Vector3 new_mov){ GameObject past_panel = GameObject.Find(actual_level.ToString()); Type t = Type.GetType(past_panel.GetComponents<MonoBehaviour>()[0].GetType ().Name); MethodInfo method = t.GetMethod("get_answer"); method.Invoke(t,new object[] { mov })); <--- PROBLEM HERE } There's always this error "Object does not match target type" related with the last line. Do you have any recommendations? 回答1

问题 I would like to call a method which is written in visual basic 6.0 from c# (visual studio 2008). Is it possible? How would I do it? 回答1: Easiest way to do it is to just compile the VB6 code as an ActiveX DLL. Then you can reference the DLL in your .net project. (Visual studio can reference ActiveX DLLs properly.) 回答2: Compile your VB6 DLL as activex dll Register it using -> regsvr32 "Full Name And Path of newly compiled vb6 dll".(use Run Dialog or Command Prompt to register) In .net Add