parent-child

问题 can anybody help with the following? I'm trying to alter the one of the custom thumbnail sizes produced by a theme in the child theme, i've added the following to functions.php in the child theme: add_theme_support( 'post-thumbnails' ); remove_image_size( 'sela-grid-thumbnail' ); add_image_size( 'sela-grid-thumbnail', 242, 242, true ); The original function from the paren theme is: add_theme_support( 'post-thumbnails' ); // Post thumbnails set_post_thumbnail_size( 820, 312, true ); // Hero

问题 I'm trying to wrap some third-party components with my own components (All of them are Angular 5 components). When using the third-party component (without wrapping them) I have the following code: <div> <xyz-menubar> <a xyzMenubarItem></a> <a xyzMenubarItem></a> </xyz-menubar> </div> My goal is to wrap these components to have the following code: <div> <app-menu> <app-menu-item></app-menu-item> <app-menu-item></app-menu-item> </app-menu> </div> This is how I coded the wrapped components (xyz

问题 I'm trying to wrap some third-party components with my own components (All of them are Angular 5 components). When using the third-party component (without wrapping them) I have the following code: <div> <xyz-menubar> <a xyzMenubarItem></a> <a xyzMenubarItem></a> </xyz-menubar> </div> My goal is to wrap these components to have the following code: <div> <app-menu> <app-menu-item></app-menu-item> <app-menu-item></app-menu-item> </app-menu> </div> This is how I coded the wrapped components (xyz

问题 I have a parent and child class. class a { val name :String = "jo" def extract(){ println(name) } } now i need to do as below. class b extends a { override def extract(){ override var name :String = "dave". //the problem is here and super.extract() name = "jenny" //here super.extract() } } Issues Im facing now. 1) I cannot use var if im to override the value in class a, needs to be immutable to use override. 2) needs to call the super function twice with different variable. 3) Cannot call

问题 I have a parent and child class. class a { val name :String = "jo" def extract(){ println(name) } } now i need to do as below. class b extends a { override def extract(){ override var name :String = "dave". //the problem is here and super.extract() name = "jenny" //here super.extract() } } Issues Im facing now. 1) I cannot use var if im to override the value in class a, needs to be immutable to use override. 2) needs to call the super function twice with different variable. 3) Cannot call

问题 Hey I have been following tutorials online to try and make a social media app and it works fine where all the posts made by users populates in one scene but in another scene I would like for the users who are currently logged in to be able to see their posts only instead of having to find their posts from a bunch of posts made by other users, below are my code samples: Posts Code: import Foundation import UIKit import Firebase class Posts{ var id: String var author: UserProfile var text:

问题 I have a HTML as: <div id="xyz"> <svg>......</svg> <img>....</img> <div id = "a"> hello </div> <div id = "b"> hello <div id="b1">I m a grand child</div> </div> <div id = "c"> hello </div> </div> I want to get all the children with tags as "div" of the parent element with id = xyz in a javascript variable. Such that my output should be: "<div id = "a"> hello </div> <div id = "b"> hello <div id="b1">I m a grand child</div> </div> <div id = "c"> hello </div>" 回答1: You can use querySelectorAll :

问题 I know I'm going to need to use fork(), but this just creates a single child process. Do i simply call fork again from within the child process? Also, I need them to communicate through a signal or pipe, which is easier to implement and what do i need to know for doing that (functions, etc..) 回答1: To create a second process, call fork() again - either within the parent or the child (but not both!). Which you choose depends on whether you want this process to be a child of the original parent

问题 I have a set of entities that can have child entities which themselves have child entities and they have child entities .... etc. The problem is that the number of subsequent child entities is not constant between entities. Example: Car has an engine, the engine have multiple components which may comprise multiple parts and the parts my have smaller parts As stated above, the number of subsequent child entities cascading down is different for instance between a Train and a Car, so I cannot

问题 I'm trying to make the child of a fixed element ignore its parent's "fixed" property, and instead scroll along with the page. So far, here is my best try, which doesn't work... CSS: .main-background { position: fixed; top: 0; z-index: -1; background-image: url(''); } .header-image { position: absolute; z-index: 100; } HTML: <div class="main-background"> <img class="header-image"/> </div> To make things clearer, I'm not trying to give an additional scrollbar to the child, I'm just trying to