hierarchy

问题 I have a quote that contains items (store in table QuoteItem): QuoteItemId, QuoteId, ItemId, Quantity etc. Now, I need to be able to create a group of chosen items in the quote and apply a discount on it. Well that's simple, I create two more tables: Group: GroupId, DiscountPercentage GroupQuoteItem: GroupId, QuoteItemId Let's say I have 30 items in a quote. I made a group that contains items 1-20 from the quote and I applied a discount on it. Now I need to have another group that contains

问题 I have hierarchy of objects with animation on translation and rotation, the scale xyz are equal and static but not 1. When I freeze scale on a parent mesh it's children's animation goes wild. Is there any way to prevent this from happening? I have found a workaround, but it's not perfect yet. Let's say we have simple setup like this: parentObject=>childObject I put childObject in a group "childObjectGroup" parent childObjectGroup to the world and zero out it's transforms excluding scale. Bake

问题 I want to use the wordnet package in R to get the word hierarchies like: "animal" is the hypernym of "cat", and "apple" is the hyponym of "fruit". But the code I can find from R wordnet help file is like below to identify antonyms: install.packages("wordnet", dependencies=TRUE) library(wordnet) filter <- getTermFilter("ExactMatchFilter", "cold", TRUE) terms <- getIndexTerms("ADJECTIVE", 5, filter) synsets <- getSynsets(terms[[1]]) related <- getRelatedSynsets(synsets[[1]],"!") sapply(related,

问题 Thanks to someone's help (Brandon), I've been able to add tooltips to the sunburst charts. I am still looking for a way to display the label of a path on the sunburst chart (and then have the dual mode tooltip + text). The example that I'd like to improve is provided on jsfiddle.net/trakkasure/UPqX5/ I am looking for the code to add to the following code section: path = svg.data([getData()]).selectAll("path") .data(partition.nodes) .enter().append("svg:path") .attr("d", arc) .style("fill",

问题 I have an php array (with comments) that has to be ordered differently. The order of the array content should be like this... parent child child child parent child child etc. The parent comments have "parent = 0". The child comments have the id of their parent (e.g. "parent = 1"). The depth/amount of child comments is unknown. How can get an array with the mentioned order when I have for example this kind of array? Array ( [0] => Array ( [comment_id] => 1 [parent] => 0 ) [1] => Array (

问题 Consider the following immutable classes: A B extends A C extends B D extends C ... Class A has a method called process that gets a parameter of type A , and then returns a value of the type of the calling object: public class A { public final <T extends A> T process(A a) { Class clazz = getClass(); T result = createObjectOfType(clazz); return result; } } public class B extends A { } public class C extends B { } This is the (very simple) test code: public void test() { A a = new A(); B b =

问题 My questions refers to the following development stack: Rails 3.2.1 Draper 0.14 Ancestry 1.2.5 What I want to do is, deliver the navigation to my layout. So I've defined a before filter in my ApplicationController . class ApplicationController < ActionController::Base [..] before_filter :current_navigation [..] def current_navigation @n = PublicationDecorator.find(1) end end As you see in the code listing above, I'm using the draper . My PublicationDecorator isn't available in the

问题 Ok - my brain is being fried at the moment so any help would be appreciated. I have multiple subclasses of UIViewController in my app. lets call them VC_A, VC_B, VC_C, VC_D . The users interacts by touching buttons on each of the views. So my AppDelegate adds in VC_A: //Add the view controller's view to the window and display. [self.window addSubview:viewController.view]; [self.window makeKeyAndVisible]; VC_A then loads VC_B by using presentModalViewController : VC_B *tempView = [[VC_B alloc]

问题 I have a table with structure and record like this ID | Name | ----------------------------------------- 01 | Group Category | 0101 | Category One | 010101 | Category One Sub | 01010101 | Category One Sub Sub | 010102 | Category One Sub Two | 01010201 | Category One Sub Sub Two | 0102 | Category Two | 010201 | Category Two Sub | 01020101 | Category Two Sub Sub | 0103 | Category Three | 010301 | Category Three Sub | 01030101 | Category Three Sub Sub | -----------------------------------------

问题 My problem is similar in a way to this one, yet different enough in my understanding. I have three tables: Units ([UnitID] int, [UnitParentID] int) Students ([StudentID] int, [UnitID] int) Events ([EventID] int, [EventTypeID] int, [StudentID] int) Students belong to units, units are stacked in a hierarchy (tree form - one parent per child), and each student can have events of different types. I need to sum up the number of events of each type per user, then aggregate for all users in a unit,