overriding

Currently (Android API 17), the only mention of super in the Android Reference on Fragment is casually via some code examples (unlike the Android Reference on Activity , which carefully notes where super is required). SO suggests searching the web as needed, or waiting for a crash, to identify where a call to super is required. I'm asking SO users to share their knowledge on which of the Fragment lifecycle methods require a call to super . Fragment lifecycle methods - require call to super onAttach() onCreate() - presumably yes, as Activity version requires it onCreateView() - seems ok with or

Hi I was wondering if there is a way to do a symmetric operator override in Python. For example, let's say I have a class: class A: def __init__(self, value): self.value = value def __add__(self, other): if isinstance(other, self.__class__): return self.value + other.value else: return self.value + other Then I can do: a = A(1) a + 1 But if I try: 1 + a I get an error. Is there a way to override the operator add so that 1 + a will work? Moses Koledoye Just implement an __radd__ method in your class. Once the int class can't handle the addition, the __radd__ if implemented, takes it up. class A

I am trying to plan how to add a couple methods to all instances of certain objects. I think adding a category to the parent object(UIViewController) would work for what I want to do, but can I override a method added this way? Most of the time the subclasses will use the default methods but I do know I will need to override the method at least once. Also what other methods should I consider for what I am trying to do? Example of what I am trying to do: I have a set of Objects that act like pages of a journal. These pages are subclasses of UIViewControllers. I want to add methods for loading,

When I let Android Studio generate override method it will generate the method with strange parameter names. For instance according to documentation onCheckedChanged should look like this: public void onCheckedChanged(CompoundButton buttonView, boolean isChecked){} but i got public void onCheckedChanged(CompoundButton compoundButton, boolean b){} or onDateSet in DatePickerDialog i got: onDateSet(DatePicker datePicker, int i, int i1, int i2) instead of onDateSet(DatePicker view, int year, int month, int dayOfMonth) I got Android SDK set up in a project and Sources for Android 27 installed. Any

I need to know how to override the Add-method of a certain Dictionary in a certain static class. Any suggestions? If it matters, the dictionary looks like this: public static Dictionary<MyEnum,MyArray[]> Any suggestions? CodesInChaos You can't override the Add method of Dictionary<,> since it's non virtual. You can hide it by adding a method with the same name/signature in the derived class, but hiding isn't the same as overriding. If somebody casts to the base class he will still call the wrong Add . The correct way to do this is to create your own class that implements IDictionary<,> (the

Possible Duplicate: Method name collision in interface implementation - Java What do we do if we need to implement two interfaces both of which contain a method with the same name and parameters, but different return types? For example: interface A { public int foo(); } interface B { public double foo(); } class C implements A, B { public int foo() {...} // compilation error } Is there an easy way to overcome this issue? The simplest solution is to always return double in A as it can store every possible int value. If you is not an option you need to use an alternative to inheritance. class C

I was a little confused with the responses to Quick way to override -Werror flag? So I ask my specific question here. I have multiple Makefiles working together and CFLAGS has been set along the way to (-Werror -Wall .. and many others) But in one of the Makefiles, I wish that the errors not be treated as warnings and so I would like to remove -Werror flag. What would be the best way to achieve this, so that only for this Makefile, -Werror flag is removed and for the others normal execution takes place? Thanks, Sunny Simpler way It looks like you can invoke gcc -c ... -Werror ... -Wno-error ..

I'm developing an app that need to support multiple languages and if the language is RTL I have to apply a custom font. For the requirement I have created my Class that extends Application . Everything was perfect till I got Oreo version device (Before I have Marshmellow enabled device). In Oreo if we want to change the language we have to create a custom ContextWrapper class, here problem come in. To use Calligraphy we need to Override the attachBaseContext method. And To change language we need to Override the attachBaseContext too I tried to call super.attachBaseContext in the Overrided