methods

问题 This question already has answers here : Computational complexity of Fibonacci Sequence (11 answers) Closed 3 years ago . So, i've got a recursive method in Java for getting the 'n'th fibonacci number - The only question i have, is: what's the time complexity? I think it's O(2^n), but i may be mistaken? (I know that iterative is way better, but it's an exercise) public int fibonacciRecursive(int n) { if(n == 1 || n == 2) return 1; else return fibonacciRecursive(n-2) + fibonacciRecursive(n-1);

问题 I have the following setup: //.h class Cell { private: POINT mCellStartingPoint; int mXoffset; int mYoffset; public: static void DrawRowOfPixels(int yoff); Cell(); ~Cell(); }; //.cpp void Cell::DrawRowOfPixels(int yoff) { HDC dc = GetDC(NULL); COLORREF red = 0xFF0000; for(int i = mCellStartingPoint.x; i < mXoffset; i++) { SetPixel(dc, mCellStartingPoint.x + i, mCellStartingPoint + yoff, red); } } However, when implementing the DrawRowOfPixels() method in the .cpp file, I get errors at all of

问题 I want to log what methods and what values are called in my java program in a text file or data base. For example:======================================== this my java program Class A { public void hello() { if(call.equalsto("world") { helloworld(); } if(call.equalsto("boy") { helloboy(); } if(call.equalsto("girl") { hellogirl(); } } public void helloworld() { system.out.println("hi world") } public void helloboy() { system.out.println("hi boy") } public void hellogirl() { system.out.println(

问题 So, I have this class: public class Product { private String name, id, info ; private int quantity; public Product(String newName, String newID, String newInfo, Integer newQuantity){ setName(newName); setID(newID); setPrice(newInfo); setQuantity(newQuantity);} public void setName(String name) { this.name = name; } public void setID(String id) { this.id = id; } public void setPrice(String info) { this.info = info; } public void setQuantity(Integer quantity) { this.quantity = quantity; } public

问题 From the Calls section of Go spec: https://golang.org/ref/spec#Calls A method call x.m() is valid if the method set of (the type of) x contains m and the argument list can be assigned to the parameter list of m . If x is addressable and &x 's method set contains m , x.m() is shorthand for (&x).m() My program. package main import ( "fmt" ) func main() { p := Point{2, 3} p.FakeScale(10) fmt.Println(p) p.RealScale(10) fmt.Println(p) } type Point struct { x int y int } func (p Point) FakeScale(s

问题 import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.reflect.Method; // declare a new annotation @Retention(RetentionPolicy.RUNTIME) @interface Demo { String str(); int val(); } public class PackageDemo { // set values for the annotation @Demo(str = "Demo Annotation", val = 100) // a method to call in the main public static void example() { PackageDemo ob = new PackageDemo(); try { Class c = ob.getClass(); // get the method example Method m = c

问题 Is it possible to call method from one class to another where two classes from two different parent class. Suppose one from UIImage class and another from UIViewController class? 回答1: Yes, one of the cool things about Objective-C is that you can call a method on any object, even if it doesn't respond. Although not as robust as in Objective-C's father, SmallTalk (yes, SmallTalk is the dad and C is the mom, don't ask), it's still pretty powerful. So let's say you have something like this: -

问题 Is there an existing method that performs a left shift on a circular array of ints? Specifically, given an array with 4 items {1,2,3,4} and a shift amount of 2, I would like a method that shifts the first two letters to the back of the array, making it appear like so: {3,4,1,2} . Would this algorithm work to shift a circular array by one? algShiftByOne(Array) { temp=array[0]; i=1 while(i < Array.length - 1) // Loop from 1 up to array.length == last index { // If there is no exception i assume

问题 I have something like this: public class Map { class DataHandler { private int posX, posY; // Other attributes public int GetX() { return posX; } public int GetY() { return posY; } // Other functions for handling data (get/set) } class FileHandler { // Functions for reading/writing setting files } DataHandler Data; FileHandler Files; public Map() { Data = new DataHandler(); Files = new FileHandler(); } } Now, when I write a setting file I need to read some variables (non-static) of the

问题 According to this question it seems like you can do this for Methods. What I want to know is why it doesn't work when I try it with properties. public class Foo { public virtual object Value { get; set; } } public class Foo<T> : Foo { public override object Value { get { return base.Value; } set { base.Value = (T)value; //inject type-checking on sets } } public new T Value { get { return (T)base.Value; } set { base.Value = value; } } } Error message from C# 4.0 RC1 Error 1 The type