methods

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: How to create variable argument methods in Objective-C Variable number of method parameters in Objective C - Need an example Following is an example of a method having variadic arguments. - (void)numberOfParameters:group,... { NSLog(@"%@",group); } In above method, I know to access the first one of the variadic arguments. Would you please help me for accessing the others as well? I am just going through ObjC.pdf

问题 Is a C++ compiler or linker (by any C++ standard) allowed to remove an unused method? Compilers seem to be allowed to remove unused static functions, linkers are allowed to remove unused functions. But i have found no information what it looks like for methods of classes. When the method is virtual this gets really interesting. 回答1: The C++ standard works on a more abstract level. It does not require a C++ implementation to actually be composed of individual tools like a compiler and a linker

问题 I have created a plugin to convert an HTML select box into a custom drop down using DIV's. All works well, but i'd like to make it a little better. see my jsFiddle At the end of the plugin I have 2 methods, slideDownOptions & slideUpOptions, I would like to make these available outside of the plugin so other events can trigger the action. Im getting a little confused how to do this and more specifically how to call the methods from both within the plugin AND from outside of the plugin. Any

问题 I have a simple, low-level container class that is used by a more high-level file class. Basically, the file class uses the container to store modifications locally before saving a final version to an actual file. Some of the methods, therefore, carry directly over from the container class to the file class. (For example, Resize() .) I've just been defining the methods in the file class to call their container class variants. For example: void FileClass::Foo() { ContainerMember.Foo(); } This

问题 I have created following method in my code: func SignIn(objDictionary:Dictionary<String,String>) { //Body of method } I need to pass the following dictionary as a parameter in this method which is defined below: let objSignInDictionary:Dictionary = ["email":emailTextField.text, "password":passwordTextField.text] How can I pass this dictionary in the above method as a parameter? This should be noted that method is in another class and I am calling the method by creating its object as follows:

问题 In C# how does one implement the ability to chain methods in one's custom classes so one can write something like this: myclass.DoSomething().DosomethingElse(x); etc... Thanks! 回答1: Chaining is a good solution to produce new instance from existing instances: public class MyInt { private readonly int value; public MyInt(int value) { this.value = value; } public MyInt Add(int x) { return new MyInt(this.value + x); } public MyInt Subtract(int x) { return new MyInt(this.value - x); } } Usage:

问题 I have yet to find an elegant solution for this. I have a class with a method I want to track the memory usage of without modifying the function: class Example { public function hello($name) { $something = str_repeat($name, pow(1024, 2)); } } $class = new Example; $class->hello('a'); So the task is, how much memory does hello() use without interferring with it? Note: The memory usage of this method should be 1MB. I've tried wrapping the call with memory_get_usage(); to no avail: class Example

问题 I want to force subclass to implement an implemented method of my mother class. I look this Java - Force implementation of an implemented method but i can't convert my mother class to an abstract class. public class myMotherClass { myMethod { ...some code .. } } public class myClass extends myMotherClass { myMethod { ... other code ... } } So, in this exemple, I want to force myClass implement myMethod. Sorry for my english... 回答1: You can not force a subclass to override a method. You can

问题 I am looking for an algorithm that can get the object that called the method, within that method. For instance: public class Class1 { public void Method () { //the question object a = ...;//the object that called the method (in this case object1) //other instructions } } public class Class2 { public Class2 () { Class1 myClass1 = new Class1(); myClass1.Method(); } public static void Main () { Class2 object1 = new Class2(); //... } } Is there any way to do this? 回答1: Obviously i don't know the

问题 Till I read this on Oracle Doc (Class methods cannot access instance variables or instance methods directly—they must use an object reference) the only thing I know, about instance methods and variables are not able to be accessed by the class(static) methods directly. What does it mean when it says ....they must use an object reference? Does it mean we can access instance variables and methods indirectly using class methods? Thank you in advance. 回答1: It means that this is allowed: public