parent-child

问题 I have a function which gets the ids of all children of a parent from my DB. So, if I looked up id 7, it might return an array with 5, 6 and 10. What I then want to do, is recursively find the children of those returned ids, and so on, to the final depth of the children. I have tried to write a function to do this, but I am getting confused about recursion. function getChildren($parent_id) { $tree = Array(); $tree_string; if (!empty($parent_id)) { // getOneLevel() returns a one-dimentional

问题 I have a classes like: [Serializable] public class child { public Parent parent; } [Serializable] public class Parent { public List<child> children; } When I deserialize Parent, I want each of each children to have a reference to it's parent. Question is, where in the deserialization process can I set the child's "parent" pointer? I can't seem to use a custom constructor for child, because deserialization always uses the default constructor. If I implement ISerializable, then it seems that

问题 I need to implement the layout as in the picture. Parent and Sibling are in a vertical LinearLayout. So I need to make a child view to overlap it's parent. Can I do that in android? 回答1: If: sibling is a sibling of parent parent is a ViewGroup and you really want child to be a child of parent then maybe you could consider using android:clipChildren set to false on parent . 回答2: I was actually just looking at an example of a FrameLayout that had a TextView overlaid on top of an ImageView. So,

问题 I've messed up my views a bit (big surprise for CC) and I have a child stream that has most of what I need, but not all. My parent stream needs to be updated, but I can't because of some issues (maybe evil twins I dunno). Is it possible/wise to do the following 1) clear all elements in the parent stream 2) use clearfsimport to perform mass update on child stream 3) deliver child stream to parent This is of course dependent on the fact that child stream elements are not deleted when deleted

问题 I've got a parent-child OO relationship . Parent obejcts has many child objects and every child object knows about it's parent by reference. The parent can be a child too ( basically its a tree ). When i do a var_dump() on the root object it says ["parent"]=> RECURSION many times and the generated description will be really long. I'm wondering if i do something wrong. If yes, i'm interested in the "best practice". Thanks for the help! 回答1: You're not doing anything wrong; you have a parent

问题 My question is related to this question: Show child element above parent element using CSS The response for that question, to set overflow: visible , works for only one parent of one child. However, I have rows of these elements; rows of parents where I need the child to display over the parent. I can get the child to display over the original parent, but I cannot get the child to display over siblings of the parents. To give you an idea of what I'm talking about, here is a screenshot: What I

问题 Within my component, how can I access the name of the parent component it is nested inside? So if my render is thus: ReactDOM.render( <RadialsDisplay data={imagedata}/>, document.getElementById('radials-1') ); How can I retrieve the id name #radials-1 from within the component itself? 回答1: It probably makes the most sense to pass it as a property, but if you really need to get it programmatically, and from inside the component, you can wait for the component to mount, find its DOM node, and

问题 i have a specific Question. My Stored Procedure don't work correctly.. I will show you the Procedure, the database and the parameter: ALTER PROCEDURE [dbo].[ManufacturerParentToChild] @ServiceProviderId int, @CarmakerId int AS BEGIN SET NOCOUNT ON; DECLARE @childSPPId int, @isDeleted bit DECLARE ServiceProviderChildren_Cursor CURSOR FOR SELECT ServiceProviderId, isDeleted FROM ServiceProvider WHERE ParentServiceProviderId = @ServiceProviderId; OPEN ServiceProviderChildren_Cursor; FETCH NEXT

问题 I have an array like that: <?php array( array( 'id' => 1, 'parent_id' => null ), array( 'id' => 2, 'parent_id' => 1 ), array( 'id' => 3, 'parent_id' => null ), array( 'id' => 4, 'parent_id' => 2 ) ) I need to sort it to every child comes after it's immediate parent. So, ID 4 item should come right after ID 2. Thanks. 回答1: Working solution : PHP has user define sorting function uasort I have used this to sort your array. <?php $data = array( array( 'id' => 1, 'parent_id' => null ), array( 'id'

问题 UserID UserName ParentID TopID 1 abc Null Null 2 edf 1 1 3 gef 1 1 4 huj 3 1 5 jdi 4 1 6 das 2 1 7 new Null Null 8 gka 7 7 TopID and ParentID is from the userID I Want to get a user record and its child and subchild record. Here userid1 is the root and its child are userid2 and userid 3. So If the user id is 1 I have to display all the records from userid 1 to userid 6 since all are child and SUbchild of the root. Similarly for userid3 I have to display userid3 and its child Userid 4 and