methods

Ok, let's say I have two windows. In the first one I have a method public void Test() { Label.Content += " works"; } And in the second one I call this method: MainWindow mw = new MainWindow(); mw.Test(); But nothing happens. What am I doing wrong? Thanks. You can assign the Owner to the window that was created in your MainWindow. window.Owner = this; //This is added to the code that use to create your Window Then you should be able to access it something like this. ((MainWindow)this.Owner).Test(); MainWindow public partial class MainWindow : Window { Window1 window = new Window1(); public

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! 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: MyInt x = new MyInt(10).Add(5).Subtract(7); You can also use this pattern to modify an existing instance, but

I've only been working with C++ for 2~3 months and recently I found out about the identifier, final , that comes after a virtual function. To this day, I believed that omission of virtual will stop the propagation of virtualness but I was wrong. It implicitly propagates. My question is this. Why allow implicit propagation? Why can't an existence of virtual make a function virtual and absense of virtual make a function not virtual? Is is better in some circumstance? or Was it, back in the day when virtual was first introduced? According to Clifford's answer , there even is a compiler that

Edit: Totally forgot to mention I'm coding in Java I'm having a real hard time making some kind of detection system or some way to make my pacman sprite/character move smoothly through my board in the game. I did not make the board it's a image. I had tried colour detection first which worked the best yet was not smooth at all and pretty choppy. I then tried to manual input coordinates of location not allowed to be entered. This also did not work out so well. I'm currently trying now to have the program use colour detection and check a separate unseen board to see if I'm still on the path.

Sorry, quick question here, just found something in my notes I don't understand in relation to making a method final. My notes claim you should make a method final for this reason : Makes it impossible to enforce invariants. A String should behave as a String. I don't really understand what is meant by this. Can someone please break it down for me ? Thanks a lot. I would guess that should have said "Make it possible to enforce invariants". Basically, if someone can override a method, then they can change behaviors affecting your class's invariants. There are typically two reasons to make a

class C1 unless method_defined? :hello # Certainly, it's not correct. I am asking to find something to do this work. def_method(:hello) do puts 'Hi Everyone' end end end So, how to judge whether a method has defined or not? Jörg W Mittag The code you posted works just fine for checking whether the method is defined or not. Module#method_defined? is exactly the right choice. (There's also the variants Module#public_method_defined? , Module#protected_method_defined? and Module#private_method_defined? .) The problem is with your call to def_method , which doesn't exist. (It's called Module#define

private void Method1() { //Do something Log("Something","Method1"); } private void Method2() { //Do something Log("Something","Method2"); } private void Log(string message, string method) { //Write to a log file Trace.TraceInformation(message + "happened at " + method); } I have several methods like Method1 and Method2 above, and i would like some way pass the method's name as a parameter, without manually editing the code. Is that possible? Excellent answer from Jon Skeet. However, if you don't use .NET 4.5 , you can try reflection . How ever you should know that reflection must be used only

I have built a nice piece of code, some animation and some click/hover events, quite a small row of them. I intend to use it on multiple html-documents (it is a game, you have to get right answer and proceed with next question), built together in another html with full-page-slider (I don't want to load DOM multiple times, makes no sense): the unsolved question is: how to reset the code without actually reloading it? how to make it to clear everything so far and start over? I am a beginner, building stuff upon others snippets. I guess it must be something so easy and basic that nobody answered