ancestor

问题 I have the following DB structure: RELATIONSHIP_TABLE - id << primary key - id_ancestor << foreign key to the same table - id_entry << foreign key to "ENTRY_TABLE" ENTRY_TABLE - id - name ... The hierarchy in table " RELATIONSHIP_TABLE " is linear. That means a record can be at most ancestor of one other record. Examples: 1. record1 2. record2 <- record3 <- record4 3. record5 <- record7 <- record9 <- record12 Every record within a particular hierarchy has the same " id_entry ". Now, I would

问题 Write following functions body. 2 Nodes are passed as parameter. You need to find Least Common Ancestor and print its value. Node structure is as following: class Node{ value; parent; } Here is the code that I have, but it works with a different Node structure. I am trying to replace .left and .right attributes with .parent. Will replacing these attributes take less memory in the program? How will it affect runtime? class Node: def __init__(self, key): self.key = key self.left = None self

问题 Goal : I am looking for an algorithm to find the best common ancestor of a graph where nodes in the graph can have zero, one, or two parents. I am not sure of the terminology of "best common ancestor": better terminology might be "lowest common ancestor", or "recent common ancestor", etc. If there is better terminology then please provide URL's that describe such. The algorithm has access to the full graph data structure. It is possible for a given node to have zero, one, or two parents. This

问题 Are the children of an entity available in a Query? Given: class Factory(db.Model): """ Parent-kind """ name = db.StringProperty() class Product(db.Model): """ Child kind, use Product(parent=factory) to make """ @property def factory(self): return self.parent() serial = db.IntegerProperty() Assume 500 factories have made 500 products for a total of 250,000 products. Is there a way to form a resource-efficient query that will return just the 500 products made by one particular factory? The

问题 Check if 2 tree nodes are related (i.e. ancestor-descendant) solve it in O(1) time, with O(N) space (N = # of nodes) pre-processing is allowed That's it. I'll be going to my solution (approach) below. Please stop if you want to think yourself first. For a pre-processing I decided to do a pre-order (recursively go through the root first, then children) and give a label to each node. Let me explain the labels in details. Each label will consist of comma-separated natural numbers like "1,2,1,4,5

问题 Is is possible to use jQuery to select an ancestor of an element? Markup: <div id="ancestor-1"> <div> <a href="#" class="click-me">Click me</a> </div> </div> <div id="ancestor-2"> <div> <a href="#" class="click-me">Click me</a> </div> </div> Script: $(".click-me").click(function(){ // var ancestorId = ???; alert(ancestorId) }); 回答1: Try parent() for the immediate parent element. $(".click-me").click(function() { var ancestor = $(this).parent(); alert(ancestor) }); Or parents() for all

问题 Need help with building an XSL version 2.0 file in converting XML file to text output. Below is the XML file. For all the elements that have field as "Checked = 'Y'" we need a "[X]" concatenated before the text output. Tab spaces should be based on the level of ansestor-tags. <Review> <Assignment/> <Authorization/> <Criteria> <Components/> <OrganizationalPolicy/> <DecisionPoints/> <Notes/> <QualityIndicators/> <Responses> <Response CPID="AISD01590403010101" Checked="Y"/> <Response CPID=

问题 Say I have a simple JFrame with a JTabbedPane containing 3 panels, and the second panel contains a JComponent. Is there a way the JComponent to be notified when "Tab 2" panel is removed from its container? My problem is that the JComponent may be deep in the hierarchy. Obviously, I am looking for SWING solution here... :) ,'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''`. | | | ,----------Y....................... | | | Tab 1 | Tab 2 | Tab 3 | | | :..........: :................

问题 Have some problems to get the position of childs division relative to the section node. Here is my XML file: <document> <section> <division>text of division</division> <division>text of division</division> <division>text of division</division> </section> <section> <division>text of division</division> <division>text of division</division> <division>text of division</division> </section> </document> And here is my XSL: <xsl:template match="/"> <xsl:for-each select="//section"> <div class=

问题 Is it the closest or the most distant parent relative of the entity being written, which determines the entity group? ( Question 1 ) For, if I have, two simultaneous requests to write two different entities, in this example, both having immediate parent the Data entity (with key '2'), and having subsequent ancestors of: Person:9 > Collection:3 > Script:4 > Data:2 > Record of Tom Cruise Person:9 > Collection:3 > Script:4 > Data:2 > Record of Shia La Boef In either case they both belong to the