methods

问题 So please forgive me as I am very new to stackoverflow and to ios programming in general. I am attempting to change the text of a button i have, replacing current text with a date string ( dateStringForInput ) I am passing in from another class. The button is called myTodayButton and is declared in my .h file for my class inputMilesViewController ... @property (strong, nonatomic) IBOutlet UIButton *myTodayButton ; Below is the code from my .m. +(void) changeButtonText:(NSString*)

问题 i tried it but didn't work in AFNetworking only showing parameters error but i used postman to check and when i send data via key and value it showing error but from raw data i send {"register_id":"3"} then it will show me data so how to post parameter like this in AFNetworking. using This Link http://www.icubemedia.net/visitorbook/display_all.php is any one can help me for that how to post that data log error is: 2015-06-19 14:05:08.078 DemoAFNetworking[72771:1160924] {"msg":"parameter

问题 I have consult (disclaimer): Class member function pointer Calling C++ class methods via a function pointer C++: Function pointer to another class function To illustrate my problem I will use this code (UPDATED) #include <iostream> #include <cmath> #include <functional> class Solver{ public: int Optimize(const std::function<double(double,double>& function_to_optimize),double start_val, double &opt_val){ opt_val = function_to_optimize(start_val); return 0; } }; class FunctionExample{ public:

问题 I can't seem to figure out what is wrong with this code. Eclipse tells me main method isn't declared. and when I run it in java.exe it tells me "could not find or load main class discount.java" I've spent the last half hour looking for a solution but can't seem to figure it out. import java.util.Scanner; public class Discount { public static void main (String[] args) { Scanner scan = new Scanner( System.in ); int price; System.out.println("Enter the Price:"); price = scan.nextInt(); System

问题 I am trying to print 'okay, thanks'. When I run it on shell, it prints on separate line and the 'thanks' is printing before 'okay'. Can anyone help what I am doing wrong? >>> test1 = Two() >>> test1.b('abcd') >>> thanks >>> okay My code class One: def a(self): print('thanks') class Two: def b(self, test): test = One() print('okay', end = test.a()) 回答1: Your problem is that when you call test.a() , you print a string, not return it. Change your code do this and it'll work just fine: def a(self

问题 I am trying to create a simple macro which basically is adding a new colum, naming it, pasting the formula and filling down. The error I get is as in the subject: Run-time error '1004': Method 'FormulaR1C1' of object 'Range' failed Here is the formula: =IF(OR($G2=DATA!$L$3;G2=DATA!$L$4;$G2=DATA!$L$5;$G2=DATA!$L$6;$G2=DATA!$L$7;$G2=DATA!$L$8;$G2=DATA!$L$9;$G2=DATA!$L$10);DATA!$L$2; IF(OR($G2=DATA!$M$3;G2=DATA!$M$4;$G2=DATA!$M$5;$G2=DATA!$M$6;$G2=DATA!$M$7;$G2=DATA!$M$8;$G2=DATA!$M$9;$G2=DATA!

问题 In Java, can a method/constructor declaration appear inside another method/constructor declaration? Example: void A() { int B() { } } I think not, but I'd love to be reassured. 回答1: No . it is not compilable. 回答2: No this is not possible. For reference: http://download.oracle.com/javase/tutorial/java/javaOO/methods.html 回答3: Not directly, but you can have a method in a class in a method: class A { void b() { class C { void d() { } } } } 回答4: This is not possible in java. However this can

问题 I come from the iOS world and just started with Android. I followed a java training so I know how to create a method, but I don't get the action one. What I would like to do is to create a method action from a button and I can't find anywhere how to do that (obviously looking in the wrong place). When I click on button 1, I want to create a method with inside only a=1 and when I click on button 2, I want a=2 (then I can decide what to do when a is 1 or 2). I created my buttons in Acitivity

问题 I'm not sure if I am turning mad but this is what my problem is: I programm Game of Life and have a "countalive" method which counts how many surrounding fields are alive. public int countalive(Board board, int yaxis, int xaxis) { //defekt int living = board.getfields()[yaxis - 1][xaxis - 1] + board.getfields()[yaxis - 1][xaxis] + board.getfields()[yaxis - 1][xaxis + 1] + board.getfields()[yaxis][xaxis - 1] + board.getfields()[yaxis][xaxis + 1] + board.getfields()[yaxis + 1][xaxis - 1] +

问题 I have troubles returning a value from a loop in method. I've tried this way: (which returns classname , my initialise String instead of classes.get(i).className ) public String getClassName(){ String cName = "classname"; for (int i=0; i<classes.size(); i++){ cName = classes.get(i).className; } return cName; } and I've tried this as well: (which returns c instead of classes.get(i).className ) public String getClassName(){ String cName = "classname"; String c = "c"; for (int i=0; i<classes