getter-setter

Tell, don't ask principle here is often pasted to me when I use getters or setters, and people tell me not to use them. The site clearly explains what I should and what I shouldn't do, but it doesn't really explain WHY I should tell, instead of asking. I find using getters and setters much more efficient, and I can do more with them. Imagine a class Warrior with attributes health and armor : class Warrior { unsigned int m_health; unsigned int m_armor; }; Now someone attacks my warrior with a special attack that reduces his armor for 5 seconds. Using setter's it would be like this: void

In JavaScript there is the possibility to create getters and setters the following way: function MyClass(){ var MyField; this.__defineGetter__("MyField",function(){ return MyField; }); this.__defineSetter__("MyField",function(value){ MyField = value; }); } But is there a way to get the Getter or Setter FUNCTION? I think of something like this: var obj = new MyClass(); obj.__getSetter__("MyField")("MyValue"); I need such a functionality when extending base classes. For example: Class "A" has field "a", Class "B" extends from "A" and also wants to have a field "a". To pass values from the "a"

Asking about Object.defineProperty as demonstrated below: function testComponent(){ var testProperty; Object.defineProperty(this, "testProperty", { get : function() { return testProperty; }, set : function(val) { testProperty = val; } }); } Where it would be used like so: testObject = new testComponent(); testObject.testProperty = "testValue"; Based on what I've seen so far, it looks like there is no cross browser solution, as I've tried using es5-shim with no luck, but I would like to confirm. I also found a reference to this post and my tests still fail in IE 7 & 8, can anyone shed any light

I Need to know how to have NetBeans generate getters and setters using a shortcut. Position the cursor inside the class, then press ALT + Ins and select Getters and Setters from the contextual menu. 来源： https://stackoverflow.com/questions/21074402/generate-getters-and-setters-in-netbeans

I have got one class with various member variables. There is a constructor and there are getter-methods, but no setter-methods. In fact, this object should be immutable. public class Example { private ArrayList<String> list; } Now I noticed the following: when I get the variable list with a getter-method, I can add new values and so on - I can change the ArrayList . When I call the next time get() for this variable, the changed ArrayList is returned. How can this be? I didn't set it again, I just worked on it! With a String this behaviour isn't possible. So what is the difference here? Just