extend

问题 I am trying to extend an element to a list in Python, however, instead of extending the string in the index 'i' it extends every character of the string in the index 'i'. For example I have a list called 'strings' with just a string 'string1' and an empty list called 'final_list'. I want to extend the first element of 'strings' to the 'final_list', so I do final_list.extend(strings[0]) . But instead of the 'final_list' to end with a length of 1, corresponding to the string inserted, the list

问题 What I want to do is really similar to this and this except I'm trying to figure out how to put an ArrayExtension inside a module. I'm trying to get something similar to the way C# extension methods work, that way I can just import the module and I'll have my extra methods. The links I provided show how to extend an existing object, but I haven't been able to figure out how to encapsulate that into a module. 回答1: If you're targeting non-browser environments like node.js this will be possible

问题 It is common knowledge that when we want to "extend" a <Component> in React, we don't actually extend its class via inheritance, but use composition to render it with custom props inside our "derived" component, like this: class Component extends React.Component { render() { return (<div className={ this.props.special_prop }> I'm a component! </div>); } } class DerivedComponent extends React.Component { render() { return (<Component special_prop='custom value' />); } } So this will create a

问题 Getting started on Ionic2 which is based on Angular2 and I'm currently trying to extend the base tab component to add an extra input. The point is to sort a list of models into tabs by an attribute. My class is the following: import {Component, Directive, Host, ElementRef, Compiler, DynamicComponentLoader, AppViewManager, NgZone, Renderer} from 'angular2/angular2'; import {IonicApp, Config, Keyboard, NavController, ViewController, Tabs, Tab} from 'ionic/ionic'; @Component({ selector: 'list

问题 I was wondering if there is a way for extending Font class in a manner that I could return my own Font class by createFont and deriveFont methods. I mean something like this... public class MyFont extends Font { // Constructor public MyFont (...) { super(...); } // createFont method public static MyFont createFont (...) { // body } // deriveFont method public static MyFont deriveFont (...) { // body } } I've tryied but I could not retrieve any font, and when doing it the font I got was the

问题 When dedicating a class to a particular Swing component, is it better to extend that particular component, or construct it internally and provide a reference? public class Foo extends JComponent{ } OR public class Foo{ public JComponent getComponent(){ } } EDIT This is what I mean by dedicating public class Foo{ private static Foo INSTANCE; public static Foo getInstance(){ if(INSTANCE == null){ INSTANCE = new Foo(); } } public void createAndShowComponent(){ //do stuff } } Inside

问题 If i have AlphaBunde that is parent of BetaBundle how can i extend a twig block without overriding the entire template? How can i import the routes that exist only in BetaBundle ? 回答1: You cannot extend a block in Twig. You can overload it if you extend a template (and call parent() which kind of works as inheritance). If you extend bundle you can overload its controllers or resources. I don't think you can really extend a template from a parent bundle because of how the paths are resolved.

问题 In SCSS , you can use @mixin and @extend to reuse code. For example: %even-row { background: pink; } @mixin even-rows-mixin($columns) { @for $i from 1 through $columns { &:nth-child(#{2 * $columns}n + #{$i + $columns}) { @extend %even-row; } } } li { @include even-rows-mixin(8); width: 12%; } Will generate: li:nth-child(16n + 9), li:nth-child(16n + 10), li:nth-child(16n + 11), li:nth-child(16n + 12), li:nth-child(16n + 13), li:nth-child(16n + 14), li:nth-child(16n + 15), li:nth-child(16n + 16

问题 I am talking about making a widget which extends a child widget of WP_Widget. Using this as reference: https://wordpress.stackexchange.com/questions/101438/how-to-extend-a-wp-widget-twice Example: My_WidgetBase extends WP_Widget My_Widget extends My_WidgetBase I want to know how to get My_Widget to show up with my other widgets (it is not currently). I have gotten My_WidgetBase to work. This is important for my framework. I understand that widget(), update(), and form() must be overridden,

问题 I'd like to know if it's possible to extend my own controllers. I've been working on web-based applications for a while and I'm now starting to find each customer that wishes to use the application has different requirements of how it should work. My thoughts are that if I generate a base structure and then extend the controllers to override any of the functions that the customers require to work differently. First of all, could you tell me if I'm on the correct track, and secondly, how do I