parent-child | 易学教程

Initialize child before parent - do not call parent contructor

阅读更多关于 Initialize child before parent - do not call parent contructor

问题 In MatLab, i have a superclass A that takes some parameters, x and y classdef A < handle properties x; y; z; end methods function this = A(x, y) this.x = x; this.y = y; this.initialize(); end function initialize(this) this.z = this.x + this.y; end end end The initialize method is supposed to do some initial calculations to fasten computation later. Now i want to create a child class B of A, with it's own inialization, but B should be initialized before A. classdef B < A properties p end

NHibernate - How to map composite-id with parent child reference

阅读更多关于 NHibernate - How to map composite-id with parent child reference

问题 i have the following scenario (For better illustration, the example is very simplified) Database Model BAS_COSTCODE refers to BAS_CONTEXT. The key for this table is a composite with COSTCODEID and the CONTEXT_FK. CONTEXT_FK refers to BAS_CONTEXT. To build up a hierarchical tree, a CostCode can have a parent. For this reason there is a reference to the table itselfe. The schema file for Context is like that: <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate

Parent element take child size in css

阅读更多关于 Parent element take child size in css

问题 I'ld like to have a parent element take it's child size. The problem is that I need the child element's width to be defined in percent (for it to be responsive). I can't set the parent element to be 50% for example, because only the child has the class I need and the block size varies by this class. I am using isotope so some of this code can't be changed. Here's an example code : <div class="parent"> <div class="child size1">content</div> </div> <div class="parent"> <div class="child size2"

Creating boats in battleship game

阅读更多关于 Creating boats in battleship game

问题 I am creating a battleship game in one of my classes. I am having trouble on creating the "PTBoat" and placing it on the screen. I have a 10x10 board and need help creating an initializing the boats. The size of the PTBoat needs to be 2 spots on the board. I think I have the random direction, column, and row figured out but am stuck on how to call it in the board class. The first portion is the PTBoat class and the second half of code is the Board Class. The main method has been fully written

How do you determine when a button is clicked in the child on the parent - ASP.NET

阅读更多关于 How do you determine when a button is clicked in the child on the parent - ASP.NET

问题 In my child user control I have a gridview with an OnRowCommand eventhandler that is executed when Edit button is click. I want to set the visibility of an ASP.NET placeholder control in the parent to true when the Edit button is clicked in child control. What would be the best way to accomplish this task? Update: After a little bit more research on the internets, I create a public event Eventhandler in my child control and rasied the event when the OnRowCommand event was fired. In my page

Swing: how to get container bind to JRadioButton?

阅读更多关于 Swing: how to get container bind to JRadioButton?

问题 I have a bunch of dynamically added panels that contain radio button and a panel with several labels bind to radio button. Suppose I have a button that should retrieve container with labels bind to selected radio button or let's say another words - data bind to selected radio button. But how to get this container? Here is my code where I try to do this (in fact this is a stub to show what is going on on UI (view) side): public class Test extends JFrame { public static ButtonGroup radioButtons

How to create dict with childrens from dict with parent_id

阅读更多关于 How to create dict with childrens from dict with parent_id

问题 How to get from this dict: cats = [ {'parent_id': False, 'id': 1, 'title': u'All'}, {'parent_id': False, 'id': 2, 'title': u'Toys'}, {'parent_id': 2, 'id': 3, 'title': u'Toypads'}, {'parent_id': 3, 'id': 4, 'title': u'Green'}, ] Something like this? cats = [ {'parent_id': False, 'id': 1, 'title': u'All'}, {'parent_id': False, 'children': [{'parent_id': 2, 'children': [{'parent_id': 3, 'id': 4, 'title': u'Green'}], 'id': 3, 'title': u'Toypads'}, [{'parent_id': 3, 'id': 4, 'title': u'Green'}]],

Disable a button in the first child div

阅读更多关于 Disable a button in the first child div

问题 I've tried to create a simple application to swap divs on clicking the respective buttons. However, the first div which is the first-child of div.container should have 'left' and 'top' button disabled. I've tried to achieve this by finding the first child and changing the property of the button inside it to disabled. But this is lost and is not retained on the new first child when I swap the first-child. Here's the code. <html> <head> <style> .box { height: 25%; width: 45%; padding: 1%;

How to get immediate parent node with scrapy in python?

阅读更多关于 How to get immediate parent node with scrapy in python?

问题 I am new to scrapy . I want to crawl some data from the web. I got the html document like below. dom style1: <div class="user-info"> <p class="user-name"> something in p tag </p> text data I want </div> dom style2: <div class="user-info"> <div> <p class="user-img"> something in p tag </p> something in div tag </div> <div> <p class="user-name"> something in p tag </p> text data I want </div> </div> I want to get the data text data I want , now I can use css or xpath selector to get it by check

Autofixture configure relationship between parent and child

阅读更多关于 Autofixture configure relationship between parent and child

问题 It seems like I can't find an easy way to create relationship between parent and child using autofixture. Let is say I have a class Order and OrderLine and OrderLine is linked with Order by OrderId . Now I have a list of Order s and I want that each order inside the list have a few OrderLine and OrderLine should have the same OrderId as per the Order class. How to configure this relationship? fixture.AddManyTo(orderlist) adds many orders with many OrderLine s but they are all random Id s and