problem about hierarchy-Collection of common programming errors
gt_ebuddy
parsing logic hierarchy
This is not a homework problem. This questions was asked to one of my friend in an interview test.I have a list of lines read from a file as input. Each line has a identifier such as (A,B,NN,C,DD) at the start of line. Depending upon the identifier, I need to map the list of records into a single object A which contains a hierarchy structure of objects.Description of Hierarchy : Each A can have zero or more B types. Each B identifier can have zero or more NN and C as child. Similarly each C seg
Justin Cave
sql plsql insert hierarchy
I have a table that stores trees. There is a node_id and parent_id. When I try the following:insert into table1 select * from table2 start with node_id = 1 connect by prior node_id = parent_id order by parent_id nulls firstI get this error:Error starting at line 6 in command: insert into table1 select * from table2 start with node_id = 1 connect by prior node_id = parent_id order by parent_id nulls first Error report: SQL Error: ORA-02291: integrity constraint (XVTEST.REGIONAL_DEFAULT_DELETE) vi
VividD
d3.js tree nodes hierarchy
I have created a collapsible tree to represent some biological data.In this tree the size of the node represents the importance of the node. As I have a huge data and also the sizes of the nodes vary,they overlap over each other. I need to specify the distance between the sibling nodes.I tried tree.separation() method but it didn’t work.Code is as follows :tree.separation(seperator);function seperator(a, b) {if(a.parent == b.parent){if((a.abundance == (maxAbd)) || (b.abundance == (maxAbd))){retu
Pascal Thivent
java orm jpa hierarchy one-to-many
There’s an Entity Class “A”. Class A might have children of the same type “A”. Also “A” should hold it’s parent if it is a child. Is this possible? If so how should I map the relations in the Entity class? [“A” has an id column.]
kanap008
java inheritance reflection hierarchy
Hi I am trying to find out the subclass, form an superclass object.if Class Super is the super class. and Class Sub1 and Class Sub2 extends Class Super.(all classes are public)Lets say I have a object of Super type as Super superObject = new Sub1();now for the superObject, is it possible to find which subclass the superObject extends in Java?Since “SuperClass will not be aware of any SubClasses it has”, can you please tell me is my above question valid in the first place, or am I missing any bas
user2341104
c++ design-patterns polymorphism hierarchy static-cast
I have a type heirarchy:class Object { … };class Node : public Object { … };class Leaf : public Object { … };class Something : public Node { … };class SomethingElse : public Leaf { … };In other words, absolutely every class inherits Object either directly or indirectly.The constructor for every object is in the following format:ClassType(Object * parent)However, by design only a Node can be a parent, while a Leaf is a terminating node;In the moment, in every constructor I am doing the
blueberryfields
c# interface hierarchy
My purpose is to find out if a class implements an interface directly. In the example below, class B implements interface IB and interface IB implements IA.How do I find out the inheritance hierarchy? When we view a type in Object Browser, it shows a detailed hierarchy. How can I achieve similar result?interface IA {string Member1 { get;set; } }interface IB : IA {string Member2 { get; set; } }class B : IB {public string Member1 { get; set; }public string Member2 { get; set; } }Reflector Screensh
Chathuranga Chandrasekara
java eclipse debugging methods hierarchy
Suppose I have a big program that consists of hundreds of methods in it. And according to the nature of input the program flow is getting changed. Think I want to make a change to the original flow. And it is big hassle to find call hierarchy/ references and understand the flow.Do I have any solution for this within Eclipse? Or a plugin? As an example, I just need a Log of method names that is in order of time. Then I don’t need to worry about the methods that are not relevant with my “given inp
CQM
android view hierarchy
My app crashes with stackoverflow error on one of my activities. This is what hierarchy viewer shows, do I have too much going on?How can I pop views out that I don’t need? I’ve read that 15 layers is too much, do I have 15+ layers? (associated question Android MapView Activity, getting Stack Overflow error everytime I leave it)
halfer
php arrays multidimensional-array hierarchy hierarchical-data
I am trying to build a hierarchical array in PHP, from relational database contents that are stored using a closure table. For a given result, I will have the full path to the LEAF node, the below would look like my result set.1~root~the root node1~root~the root node>>>2~category1~First category1~root~the root node>>>3~category2~Second category1~root~the root node>>>2~category1~First category>>>4~subCatOfCategory1~SubCategory of Cat 1Anyway, those are my database results. So I want to traverse
sharptooth
c++ inheritance hierarchy access-modifiers
I found some rather strange code:class Base { public:virtual bool IsDerived() const { return false; } };class Derived : public Base { public:bool IsDerived() const { return true; } };Derived* CastToDerived( Base* base ) {// private and protected inheritance from Derived is prohibitedDerived* derived = dynamic_cast<Derived*>(base);if( derived == 0 ) {assert( !base->IsDerived() );}return derived; }I don’t get the passage about private and protected inheritance.Suppose, I inherit from Deri
user1204703
ios linker command hierarchy viewer
I find a project called “iOS-Hierarchy-Viewer” that can inspect the ios native Views. so I create a project called “ViewViewer” and do as the workaround of the “Installation” just README.md describles. however, when I build it, and failed. error:Ld /Users/hundsun/Library/Developer/Xcode/DerivedData/iphone-gsuyenresnoeexcuqguzciigntxr/Build/Products/Debug-iphonesimulator/ViewViewer.app/ViewViewer normal i386 cd /Users/hundsun/Documents/projects/ViewViewer setenv MACOSX_DEPLOYMENT_TARGET 10.6 ….
PHI
c hierarchy
This question already has an answer here:Could anyone explain these undefined behaviors (i = i++ + ++i , i = i++, etc…)9 answersWhen I type my code like given below :int a=10,b,c,d,e; c= a++; d = ++a; e = ++a; printf(“value of c=%d, d =%d, e=%d”,c,d,e);it gives me an output like c =10 , d= 12, e=13 and when we add these values,i.e 10+12+13 becomes 35, but when I code it like :b = a++ + ++a + ++a; printf(“value of b=%d” ,b);it gives me output 36.Can somebody describe what’s the process b
Jens Gustedt
c++ function hierarchy
I’m learning C/C++ and I have a question about this exercise.#include<iostream> using namespace std;class B {public:int x;B(int z=1): x(z) {} };class D: public B {public:int y;D(int z=5): B(z-2), y(z) {} };void fun(B* a, int size) {for(int i=0; i<size; ++i) cout << (*(a+i)).x << ” “; }int main(){fun(new D[4],4); cout << “**1\n”;B* b = new D[4]; fun(b,4); cout << “**2\n”;b[0] = D(6); b[1] = D(9); fun(b,4); cout << “**3\n”;b = new B[4]; b[0] = D(6); b[1] = D(
Emil
javascript class parent-child hierarchy
I wrote two classes the other day, where I needed to override and call the overridden method (getQuery).//parent function SimpleUser() {this.firstName = “X”; }SimpleUser.prototype.getQuery = function(sub) {//solution for not getting undefined variablesvar that = sub || this; var query = “first=”+that.firstName;return query; }//child function User() {//extends this.base = SimpleUser;//super()this.base();//prints “X”console.log(this.firstName);this.lastName = “Y”; }//override User.prototype.getQue
janetsmith
hibernate annotations hierarchy composite-pattern
I wonder how to map single class composite pattern with annotations in Hibernate? An human object can contains children, and each child can have his/her own children. Thank you.Human domain class:@Entity public class Human implements Serializable {private Human parent;@ManyToOne@JoinColumn(name = “parent_id”)public Human getParent(){return parent;}public void setParent(Human parent){this.parent = parent;}private List<Human> children = new ArrayList<Human>();@OneToMany(mappedBy = “par
JMax
drupal-7 design-patterns hierarchy taxonomy
I have a Drupal 7.9 taxonomy vocabulary according to the following scheme:category-1category-1 > subcategory-1-1category-1 > subcategory-1-2category-1 > subcategory-1-3 category-2category-2 > subcategory-2-1I want to reflect this taxonomy hierarchy in my page url path like category-1/subcategory-1-1/page-123To achieve this I’m using the modul Pathauto version 7.x-1.0. but I don’t know which pattern I have to use.Currently I’m using [node:%field_taxonomy%]/[node:title] but with this p
TemplateRex
c++ exception stl hierarchy
Why did the C++ standard bother inventing the std::exception classes? What’s their benefit? My reason for asking is this:try {throw std::string(“boom”); } catch (std::string str) {std::cout << str << std::endl; }Works fine. Later, if I need, I can just make my own lightweight “exception” types. So why should I bother with std::exception?
Scott????
c# mysql entity-framework orm hierarchy
i’m keep getting this error msg:Exception Details: MySql.Data.MySqlClient.MySqlException: Unknown column ‘Extent1.RuleType’ in ‘field list’my mapping:public abstract class AlertRule {private DateTime? _updateDateTime = DateTime.Now;[Key]public int Id { get; set; }public int TemplateId { get; set; }public virtual AlertRuleTemplate Template { get; set; }public string RuleType{get{if (Template == null)return null;return Template.Name;}} } public class AlertOutageRule:AlertRule {public virtual List&
Jeff Axelrod
android view hierarchy settext
Hi and thank you for looking at my question. I am an intermediate programmer in C but an Android newbie. I have been trying to get a chat programming working. Assuming everything else in the code below works perfectly. The one question I like to ask is when I try to setText() from a thread running, I get an exception above. I looked at many many websites and here too. Found many things, but I really do not understand. Please explain to me in the most simple way or offer me some simple fix if pos
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