{"id":3698,"date":"2014-03-29T08:05:07","date_gmt":"2014-03-29T08:05:07","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/29\/problem-about-hierarchy-collection-of-common-programming-errors\/"},"modified":"2014-03-29T08:05:07","modified_gmt":"2014-03-29T08:05:07","slug":"problem-about-hierarchy-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/29\/problem-about-hierarchy-collection-of-common-programming-errors\/","title":{"rendered":"problem about hierarchy-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e173abbf68f0308f9d0b9377e235cfea?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ngt_ebuddy<br \/>\nparsing logic hierarchy<br \/>\nThis 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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/0a116491222bf3f94c85381528593fd7?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJustin Cave<br \/>\nsql plsql insert hierarchy<br \/>\nI 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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/11564daa64a4b0252a133fe3801468a7?s=32&amp;d=identicon&amp;r=PG&amp;f=1\" \/><br \/>\nVividD<br \/>\nd3.js tree nodes hierarchy<br \/>\nI 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&#8217;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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/dc1a5b5fdba36ae9cdcf6e267f1a86ca?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nPascal Thivent<br \/>\njava orm jpa hierarchy one-to-many<br \/>\nThere&#8217;s an Entity Class &#8220;A&#8221;. Class A might have children of the same type &#8220;A&#8221;. Also &#8220;A&#8221; should hold it&#8217;s parent if it is a child. Is this possible? If so how should I map the relations in the Entity class? [&#8220;A&#8221; has an id column.]<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/384712a9a55eee167c3dba290d99b122?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nkanap008<br \/>\njava inheritance reflection hierarchy<br \/>\nHi 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 &#8220;SuperClass will not be aware of any SubClasses it has&#8221;, can you please tell me is my above question valid in the first place, or am I missing any bas<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/00afab8556e4ac6e69d7e77db776b5f9?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser2341104<br \/>\nc++ design-patterns polymorphism hierarchy static-cast<br \/>\nI have a type heirarchy:class Object { &#8230; };class Node : public Object { &#8230; };class Leaf : public Object { &#8230; };class Something : public Node { &#8230; };class SomethingElse : public Leaf { &#8230; };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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e09251f97ace7198ecf804f79b602885?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nblueberryfields<br \/>\nc# interface hierarchy<br \/>\nMy 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<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/201641a489349495d6c0846e219d9a5e?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nChathuranga Chandrasekara<br \/>\njava eclipse debugging methods hierarchy<br \/>\nSuppose 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&#8217;t need to worry about the methods that are not relevant with my &#8220;given inp<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/65da61e2d1068dce9bfe8999e3eb6ec2?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nCQM<br \/>\nandroid view hierarchy<br \/>\nMy 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&#8217;t need? I&#8217;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)<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/9da1fe0ca09c408213402533ff38812c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nhalfer<br \/>\nphp arrays multidimensional-array hierarchy hierarchical-data<br \/>\nI 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&gt;&gt;&gt;2~category1~First category1~root~the root node&gt;&gt;&gt;3~category2~Second category1~root~the root node&gt;&gt;&gt;2~category1~First category&gt;&gt;&gt;4~subCatOfCategory1~SubCategory of Cat 1Anyway, those are my database results. So I want to traverse<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2a04086d7656ac97e09c20c4fe4d8266?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsharptooth<br \/>\nc++ inheritance hierarchy access-modifiers<br \/>\nI 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&lt;Derived*&gt;(base);if( derived == 0 ) {assert( !base-&gt;IsDerived() );}return derived; }I don&#8217;t get the passage about private and protected inheritance.Suppose, I inherit from Deri<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e1eef3e876faf4ac651233e4fcdd8c46?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1204703<br \/>\nios linker command hierarchy viewer<br \/>\nI find a project called &#8220;iOS-Hierarchy-Viewer&#8221; that can inspect the ios native Views. so I create a project called &#8220;ViewViewer&#8221; and do as the workaround of the &#8220;Installation&#8221; 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 &#8230;.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/xZ19Y.jpg?s=32&amp;g=1\" \/><br \/>\nPHI<br \/>\nc hierarchy<br \/>\nThis question already has an answer here:Could anyone explain these undefined behaviors (i = i++ + ++i , i = i++, etc\u2026)9 answersWhen I type my code like given below :int a=10,b,c,d,e; c= a++; d = ++a; e = ++a; printf(&#8220;value of c=%d, d =%d, e=%d&#8221;,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(&#8220;value of b=%d&#8221; ,b);it gives me output 36.Can somebody describe what&#8217;s the process b<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/863018588657c38d29f22e72dc81325e?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJens Gustedt<br \/>\nc++ function hierarchy<br \/>\nI&#8217;m learning C\/C++ and I have a question about this exercise.#include&lt;iostream&gt; 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&lt;size; ++i) cout &lt;&lt; (*(a+i)).x &lt;&lt; &#8221; &#8220;; }int main(){fun(new D[4],4); cout &lt;&lt; &#8220;**1\\n&#8221;;B* b = new D[4]; fun(b,4); cout &lt;&lt; &#8220;**2\\n&#8221;;b[0] = D(6); b[1] = D(9); fun(b,4); cout &lt;&lt; &#8220;**3\\n&#8221;;b = new B[4]; b[0] = D(6); b[1] = D(<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2eb6a7096c6cd74c235548f3c1f33dcc?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nEmil<br \/>\njavascript class parent-child hierarchy<br \/>\nI wrote two classes the other day, where I needed to override and call the overridden method (getQuery).\/\/parent function SimpleUser() {this.firstName = &#8220;X&#8221;; }SimpleUser.prototype.getQuery = function(sub) {\/\/solution for not getting undefined variablesvar that = sub || this; var query = &#8220;first=&#8221;+that.firstName;return query; }\/\/child function User() {\/\/extends this.base = SimpleUser;\/\/super()this.base();\/\/prints &#8220;X&#8221;console.log(this.firstName);this.lastName = &#8220;Y&#8221;; }\/\/override User.prototype.getQue<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/102244f66452f3a0fb7a61dee804e96a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\njanetsmith<br \/>\nhibernate annotations hierarchy composite-pattern<br \/>\nI 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 = &#8220;parent_id&#8221;)public Human getParent(){return parent;}public void setParent(Human parent){this.parent = parent;}private List&lt;Human&gt; children = new ArrayList&lt;Human&gt;();@OneToMany(mappedBy = &#8220;par<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e526fad25155097bcda4a97b26d78993?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJMax<br \/>\ndrupal-7 design-patterns hierarchy taxonomy<br \/>\nI have a Drupal 7.9 taxonomy vocabulary according to the following scheme:category-1category-1 &gt; subcategory-1-1category-1 &gt; subcategory-1-2category-1 &gt; subcategory-1-3 category-2category-2 &gt; 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&#8217;m using the modul Pathauto version 7.x-1.0. but I don&#8217;t know which pattern I have to use.Currently I&#8217;m using [node:%field_taxonomy%]\/[node:title] but with this p<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/o7w9X.png?s=32&amp;g=1\" \/><br \/>\nTemplateRex<br \/>\nc++ exception stl hierarchy<br \/>\nWhy did the C++ standard bother inventing the std::exception classes? What&#8217;s their benefit? My reason for asking is this:try {throw std::string(&#8220;boom&#8221;); } catch (std::string str) {std::cout &lt;&lt; str &lt;&lt; std::endl; }Works fine. Later, if I need, I can just make my own lightweight &#8220;exception&#8221; types. So why should I bother with std::exception?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/29c8143c0fed1a8f7aba688250cfffb5?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nScott????<br \/>\nc# mysql entity-framework orm hierarchy<br \/>\ni&#8217;m keep getting this error msg:Exception Details: MySql.Data.MySqlClient.MySqlException: Unknown column &#8216;Extent1.RuleType&#8217; in &#8216;field list&#8217;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&amp;<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/71a257df94db5d04b4f2ec6e1ecc45f7?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJeff Axelrod<br \/>\nandroid view hierarchy settext<br \/>\nHi 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<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3698","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=3698"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3698\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=3698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=3698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=3698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}