extend

I'm wondering whether in the situation where I'm extending a class that has already 'use' keyword above it to use specific namespace - do I need to add another 'use' above the inheriting class to use the same namespace? Situation like this: namespace Core; use System\Plugin; class Front extends Application { } and now in the Controller, which is called directly without the namespace (using full path): use System\Plugin; class PageController extends Front { } or would it work without 'use' as well and allow me to use the System\Plugin namespace: class PageController extends Front { } ? No, you

I'm trying to extend all dom elements so i can get and remove their children. The function is below (works in FF and Chrome). Is there an equivalent in IE7 to extend the base dom object? if (!Element.get) { Element.prototype.get = function(id) { for (var i = 0; i < this.childNodes.length; i++) { if (this.childNodes[i].id == id) { return this.childNodes[i]; } if (this.childNodes[i].childNodes.length) { var ret = this.childNodes[i].get(id); if (ret != null) { return ret; } } } return null; } } Element.prototype.removeChildren = function() { removeChildren(this); } Thanks! No. There will be some

I'm looking through various libraries, and seeing extend() pop up a lot, but I'm also seeing mixin() show up. YUI has both mixins and extensions. What's the difference between these two concepts? When would I decide between a mixin and extending an object? Thanks, Matt Mixins don't work with instanceof but extends do. Mixins allow multiple inheritance but by faking it, not by properly chaining the prototypes. I'll show an Ext-JS example but the concept applies to any class library that provides mixins, they all just copy properties to the object instead of chaining the prototype. Ext.define(

Is it possible to make a child class that extends ArrayList? If so, how? You can extend any class that is not final in Java. Having said that, you should avoid inheritance if there is no true is-a relationship. Consider composition for reuse. Read about Liskov substitution principle helloworld922 Yes you can. public class MyArrayList<E> extends ArrayList<E> { } However, I'm not sure why you would want to do this. As many other have said, yes, you can extend class ArrayList , but it is not something that you should normally do; it is not considered good practice in Java. I'm mainly a Java

I'm using WordPress as a CMS, and I want to extend one of its classes without having to inherit from another class; i.e. I simply want to "add" more methods to that class: class A { function do_a() { echo 'a'; } } then: function insert_this_function_into_class_A() { echo 'b'; } (some way of inserting the latter into A class) and: A::insert_this_function_into_class_A(); # b Is this even possible in tenacious PHP? If you only need to access the Public API of the class, you can use a Decorator : class SomeClassDecorator { protected $_instance; public function myMethod() { return strtoupper( $this