It’s definitely “supported”. It is your web page, you do whatever you want to with it. I already did this to track analytics events without modifying a library but by sneaking into events. Use the proxy pattern: (function(proxied) { window.alert = function() { // do something here return proxied.apply(this, arguments); }; })(window.alert); You can also … Read more
The below only works if the iframe content is from the same parent domain. The following jquery script works for me. Tested on Chrome and IE8. The inner iframe references a page that is on the same domain as the parent page. In this particular case, I am hiding an element with a specific class … Read more
I always find things like this more easily understood with pictures: Again, taking joseph daigle’s code, public class Foo { public /*virtual*/ bool DoSomething() { return false; } } public class Bar : Foo { public /*override or new*/ bool DoSomething() { return true; } } If you then call the code like this: Foo … Read more
Based on this and fwc:s answer I created a pip installable package https://github.com/mkorpela/overrides From time to time I end up here looking at this question. Mainly this happens after (again) seeing the same bug in our code base: Someone has forgotten some “interface” implementing class while renaming a method in the “interface”.. Well Python ain’t … Read more
Judging by the wording of your question (you used the word “hide”), you already know what is going on here. The phenomenon is called “name hiding”. For some reason, every time someone asks a question about why name hiding happens, people who respond either say that this called “name hiding” and explain how it works … Read more
Most of the time you need to create a Service to perform something in the background, and your visible Activity simply controls this Service. (I’m sure the Music player works in the same way, so the example in the docs seems a bit misleading.) If that’s the case, then your Activity can finish as usual … Read more
That’s indeed the idea. The point is that you are explicit about what you mean, so that an otherwise silent error can be diagnosed: struct Base { virtual int foo() const; }; struct Derived : Base { virtual int foo() // whoops! { // … } }; The above code compiles, but is not what … Read more
They are exactly the same. There is no difference between them other than that the first approach requires more typing and is potentially clearer.
The override modifier may be used on virtual methods and must be used on abstract methods. This indicates for the compiler to use the last defined implementation of a method. Even if the method is called on a reference to the base class it will use the implementation overriding it. public class Base { public … Read more
Calling virtual functions from a constructor or destructor is dangerous and should be avoided whenever possible. All C++ implementations should call the version of the function defined at the level of the hierarchy in the current constructor and no further. The C++ FAQ Lite covers this in section 23.7 in pretty good detail. I suggest … Read more