Strange behavior when overriding private methods

Inheriting/overriding private methods In PHP, methods (including private ones) in the subclasses are either: Copied; the scope of the original function is maintained. Replaced (“overridden”, if you want). You can see this with this code: <?php class A { //calling B::h, because static:: resolves to B:: function callH() { static::h(); } private function h() { … Read more

Can you override between extensions in Swift or not? (Compiler seems confused!)

It seems that overriding methods and properties in an extension works with the current Swift (Swift 1.1/Xcode 6.1) only for Objective-C compatible methods and properties. If a class is derived from NSObject then all its members are automatically available in Objective-C (if possible, see below). So with class A : NSObject { } your example … Read more

Django Admin – Overriding the widget of a custom form field

The django admin uses custom widgets for many of its fields. The way to override fields is to create a Form for use with the ModelAdmin object. # forms.py from django import forms from django.contrib import admin class ProductAdminForm(forms.ModelForm): def __init__(self, *args, **kwargs): super(ProductAdminForm, self).__init__(*args, **kwargs) self.fields[‘tags’].widget = admin.widgets.AdminTextareaWidget() Then, in your ModelAdmin object, you … Read more

Override and overload in C++

Overloading generally means that you have two or more functions in the same scope having the same name. The function that better matches the arguments when a call is made wins and is called. Important to note, as opposed to calling a virtual function, is that the function that’s called is selected at compile time. … Read more

How do I override a Python import?

Does this answer your question? The second import does the trick. Mod_1.py def test_function(): print “Test Function — Mod 1” Mod_2.py def test_function(): print “Test Function — Mod 2” Test.py #!/usr/bin/python import sys import Mod_1 Mod_1.test_function() del sys.modules[‘Mod_1’] sys.modules[‘Mod_1’] = __import__(‘Mod_2’) import Mod_1 Mod_1.test_function()

Java generic method inheritance and override rules

What we are having here is two different methods with individual type parameters each. public abstract <T extends AnotherClass> void getAndParse(Args… args); This is a method with a type parameter named T, and bounded by AnotherClass, meaning each subtype of AnotherClass is allowed as a type parameter. public <SpecificClass> void getAndParse(Args… args) This is a … Read more