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How to hide one item in an Android Spinner
...pinner dropdown you need to pass the position of item which needs to hided based on criteria required.
I have achieved this in a use case of hiding the item which is selected from dropdown
public class CustomAdapter extends ArrayAdapter<String> {
private List<String> dates;
private int...
C++ “virtual” keyword for functions in derived classes. Is it necessary?
...Virtual functions
2 If a virtual member function vf is declared in a class Base and in a class Derived, derived directly or indirectly from Base, a member function vf with the same name, parameter-type-list (8.3.5), cv-qualification, and ref-qualifier (or absence of same) as Base::vf is declared, th...
How can I initialize base class member variables in derived class constructor?
...{
B()
{
a = 0;
b = 0;
}
};
You can't access base members in the initializer list, but the constructor itself, just as any other member method, may access public and protected members of the base class.
...
Python class inherits object
... two styles of classes depending on the presence or absence of object as a base-class:
"classic" style classes: they don't have object as a base class:
>>> class ClassicSpam: # no base class
... pass
>>> ClassicSpam.__bases__
()
"new" style classes: they have, directly...
Understanding Python super() with __init__() methods [duplicate]
...
super() lets you avoid referring to the base class explicitly, which can be nice. But the main advantage comes with multiple inheritance, where all sorts of fun stuff can happen. See the standard docs on super if you haven't already.
Note that the syntax changed i...
Clang optimization levels
...asses is available here.
With version 6.0 the passes are as follow:
baseline (-O0):
opt sets: -tti -verify -ee-instrument -targetlibinfo -assumption-cache-tracker -profile-summary-info -forceattrs -basiccg -always-inline -barrier
clang adds : -mdisable-fp-elim -mrelax-all
-O1 is based on -...
Swift native base class or NSObject
...uld hide coding bugs. Here is an example.
In this example, where we don't base on NSObject, the compiler correctly spots the error in testIncorrect_CompilerShouldSpot,
reporting "... 'MyClass' is not convertible to 'MirrorDisposition'"
class MyClass {
let mString = "Test"
func getAsString() -...
Unable to Cast from Parent Class to Child Class
...tor. For example, being building a ferrari with the properties defined in base object car. Or, start with a human and create a Boy. Casting and direct use? Agree that's a no-no. But if it's part of constructor or something, could work. The serialization answer below is a nice touch.
...
Enum “Inheritance”
...
You can achieve what you want with classes:
public class Base
{
public const int A = 1;
public const int B = 2;
public const int C = 3;
}
public class Consume : Base
{
public const int D = 4;
public const int E = 5;
}
Now you can use these classes similar as w...
What are the rules for calling the superclass constructor?
...
Base class constructors are automatically called for you if they have no argument. If you want to call a superclass constructor with an argument, you must use the subclass's constructor initialization list. Unlike Java, C++...