overriding

问题 I have a SuperClass which defines a property and it's setter, like so: class A(object): def __init__(self): self._mode = None @property def mode(self): # to be overriden in subclass to implement the actual getter code raise NotImplementedError @mode.setter def mode(self, value): # common assertions and input validations self._set_mode(value) def _set_mode(self, value): # to be overriden in subclass to implement the actual setter code raise NotImplementedError class B(A): @property def mode

问题 I'm trying to make a dict -like class in Python. When you make a class, you have certain methods that tell Python how to make a built-in class. For example, overriding the __int__ method tells Python what to return if the user uses int() on an instance of the class. Same for __float__ . You can even control how Python would make an iterable object of the class by overriding the __iter__ method (which can help Python make list s and tuple s of your class). My question is how would you tell

问题 Can't override magento core config model Mage_Core_Model_Config. I have magento 1.9.2.1. Here is config.xml <global> <helpers> <peexl_customflatrate> <class>Peexl_CustomFlatrate_Helper</class> </peexl_customflatrate> </helpers> <models> <peexl_customflatrate> <class>Peexl_CustomFlatrate_Model</class> </peexl_customflatrate> <core> <rewrite> <config>Peexl_CustomFlatrate_Core_Config</config> </rewrite> </core> And class Peexl/CustomFlatrate/Model/Core/Config.php class Peexl_CustomFlatrate_Model

问题 The basic question is: How do I perform a basic override of a plugin method without editing the original plugin file? Is it possible to create an override for a specific instance: Example: An rtf plugin uses: $('selector').wysiwyg('setContent',newContent); In order to display the rtf text as readonly I would like for the same method to be applied to a div instead of the body of the IFRAME I would like to overwrite the original 'setContent' with my own code, just for this one element. Thanks

问题 I am trying to @Override a method in a class that might look like having a complex inheritance structure, but it should actually be quite simple, however I cannot get it to work. public interface Action { } public interface Result { } public interface Player<A extends Action, R extends Result> { default public <P extends Player<A, R>> void onPostAction(final P target, final A action, final R result) { } } abstract public class GesturePlayer<A extends Action, R extends Result> implements

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: What's “@Override” there for in java? I've never put "@Override" before a method until now. I see some code examples with it, but I don't understand its utility. I'd love some explanation. Many thanks, JDelage 回答1: First, you can't annotate a class with @Override . This annotation indicates that a method declaration is intended to override a method declaration in a superclass. You don't have to annotate

问题 I usually lazy instantiate my @property objects in their getter methods like this: @interface MyGenericClass : UIViewController @property(nonatomic, readonly) UIImageView *infoImageView // ... @implementation GenericClass - (UIImageView *)infoImageView { if (!_infoImageView) { _infoImageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"PlaceholderInfoImage"]]; } return _infoImageView; } But when subclassing, I would often like to override some of the @properties to be more

问题 function Ninja(){ this.swingSword = function(){ return true; }; } // Should return false, but will be overridden Ninja.prototype.swingSword = function(){ return false; }; var ninja = new Ninja(); log( ninja.swingSword(), "Calling the instance method, not the prototype method." ); now log showing me true. which means swingSword that were defined in Ninja.prototype has overridden so how can i override the constructor function or property.?? i know that preference is given to constructor

问题 I am looking for a way to properly ovverride the default .create() method of a ModelSerializer serializer in Django Rest Framework for dealing with an extra parameter. In my original Django model I have just overridden the default .save() method for managing an extra param. Now .save() can be called also in this way: .save(extra = 'foo') . I have to create a ModelSerializer mapping on that original Django model: from OriginalModels.models import OriginalModel from rest_framework import

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: C# keyword usage virtual+override vs. new Difference between new and override? So I've been working on a project and decided to do some reading about the difference between the new and override keywords in C#. From what I saw, it seems that using the new keyword functionality is a great way to create bugs in the code. Apart from that I don't really see when it would actually make sense to use it. More out of