Questions tagged [hierarchy]
For issues relating to creating, maintaining, or displaying a hierarchy of data or resources, etc.
hierarchy
2,871
questions
672
votes
38
answers
442k
views
Attempt to present UIViewController on UIViewController whose view is not in the window hierarchy
Just started using Xcode 4.5 and I got this error in the console:
Warning: Attempt to present < finishViewController: 0x1e56e0a0 > on < ViewController: 0x1ec3e000> whose view is not in the ...
- 10.9k
433
votes
3
answers
293k
views
How to view hierarchical package structure in Eclipse package explorer
OK here's what I would like: in the Eclipse package explorer, I see the following: (dot represents a clickable arrow that I can use to expand the folder)
PROJECT
Source Folder
Package
...
- 7,283
222
votes
15
answers
440k
views
Getting activity from context in android
This one has me stumped.
I need to call an activity method from within a custom layout class. The problem with this is that I don't know how to access the activity from within the layout.
...
- 12.1k
115
votes
2
answers
113k
views
JPA: How to have one-to-many relation of the same Entity type
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 ...
- 5,136
101
votes
5
answers
41k
views
Moving a git repository up one hierarchy level
Git beginner question:
I have a small private webproject which is versioned locally with msysgit. There is no exterior repository, as it's only for me, so i can bascially do whatever I want.
I've ...
- 2,615
91
votes
17
answers
114k
views
Warning: Attempt to present * on * whose view is not in the window hierarchy - swift
I'm trying to present a ViewController if there is any saved data in the data model. But I get the following error:
Warning: Attempt to present * on *whose view is not in the window hierarchy"
...
- 997
76
votes
4
answers
32k
views
How should I deal with object hierarchies in a RESTful API?
I am currently designing the API for an existing PHP application, and to this end am investigating REST as a sensible architectural approach.
I believe I have a reasonable grasp of the key concepts, ...
- 3,293
70
votes
3
answers
102k
views
SQL Server OPENJSON read nested json
I have some json that I would like to parse in SQL Server 2016. There is a hierarchy structure of Projects->Structures->Properties. I would like to write a query that parses the whole hierarchy but ...
- 2,423
50
votes
3
answers
65k
views
Get all child records given a parent id in a self referencing table
I have a table which references itself and I need to be able to select the parent and all it's child records from a given parent Id.
My table is as follows:
ID | ParentID | Name
------------...
- 11.4k
49
votes
2
answers
64k
views
How can I list all classes loaded in a specific class loader
For debug reasons, and curiosity, I wish to list all classes loaded to a specific class loader.
Seeing as most methods of a class loader are protected, what is the best way to accomplish what I want?
...
- 4,799
49
votes
9
answers
28k
views
SQL - How to store and navigate hierarchies?
What are the ways that you use to model and retrieve hierarchical info in a database?
- 1,702
46
votes
1
answer
41k
views
How to design a hierarchical role based access control system
Basic deal is, we have a custom built "kickstart" for our projects. For this we are looking at redoing the user control. I know there are a lot of questions out there about general rbac, but I cannot ...
- 91.5k
40
votes
2
answers
30k
views
How to mix inheritance strategies with JPA annotations and Hibernate?
According to the Hibernate Reference Documentation it should be possible to mix different inheritance mapping strategies when using Hibernate's XML-Metadata:
http://docs.jboss.org/hibernate/stable/...
- 713
37
votes
3
answers
15k
views
Object Browser inside the Android Studio
I need to navigate through the whole android api objects inside the Android Studio to find out classes that extend an individual class and also list of class and interfaces that is extended by an ...
- 1,009
36
votes
14
answers
100k
views
Eclipse The hierarchy of the type ... is inconsistent with @Configurable annotation
I am developing a Spring/Vaadin/Hibernate application.
Everything works but I still have the following error markers in Eclipse STS 2.8.1:
The hierarchy of the type BankView is inconsistent
The ...
- 4,337
35
votes
5
answers
28k
views
How should a REST URL schema look like for a tree hierarchy?
Let's assume that I have stores, shelves in a store, and products on a shelf. So in order to get a list of products on a shelf in a store, I'd use the following request:
GET http://server/stores/123/...
- 38k
34
votes
3
answers
15k
views
Maven naming conventions for hierarchical multiple module projects
I've got a question on Maven naming conventions (groupId, artifactId and directory names) in a multiple module project with a hierarchical directory structrure.
Research
Before asking, I went ...
- 6,422
31
votes
3
answers
21k
views
Setting property value on child instance to a fixed value with Autofixture
Is it possible to assign a fixed value to a property on a child instance when building a parent with Autofixture? It will add default values to all the properties on the child instance like a charm, ...
- 313
30
votes
3
answers
42k
views
Get all parents for a child
I want to retrieve the parentid of an id, if that parentid has a parent again retrieve it, and so on.
Kind of hierarchy table.
id----parentid
1-----1
5-----1
47894--5
47897--47894
am new to sql ...
- 311
28
votes
2
answers
35k
views
How to use enum with grouping and subgrouping hierarchy/nesting
I have one enum 'class' called Example as follows:
enum Example {
//enums belonging to group A:
enumA1,
enumA2,
enumA3,
//enums belonging to group B:
enumB1,
enumB2,
enumB3,
//enums ...
- 3,839
28
votes
3
answers
32k
views
How can I split my javascript code into separate files?
I'm reading the Javascript Guide from Mozilla
And when they contrasted JS to Java , It got me thinking, Java code is easily split up with each class in his own file. after futher search , I understand ...
- 2,630
27
votes
2
answers
29k
views
Construct hierarchy tree from flat list with parent field? [duplicate]
I have a list of "page" objects with a parent field. This parent field references another object in the list. I would like to create a tree hierarchy from this list based on this field.
Here is what ...
- 35.2k
24
votes
2
answers
10k
views
Smooth transitioning between tree, cluster, radial tree, and radial cluster layouts
For a project, I need to interactively change hierarchical data layout of a visualization - without any change of the underlying data whatsoever. The layouts capable of switching between themselves ...
- 10.5k
23
votes
1
answer
7k
views
Implementing NSCopying in Subclass of Subclass
I have a small class hierarchy that I'm having trouble implementing copyWithZone: for. I've read the NSCopying documentation, and I can't find the correct answer.
Take two classes: Shape and Square. ...
- 31.8k
23
votes
7
answers
20k
views
C# algorithm for generating hierarchy
I've got a text file that looks like this:
{ Id = 1, ParentId = 0, Position = 0, Title = "root" }
{ Id = 2, ParentId = 1, Position = 0, Title = "child 1" }
{ Id = 3, ParentId = 1, Position = 1, Title ...
- 59.8k
23
votes
6
answers
24k
views
Building hierarchy objects from flat list of parent/child
I have a list of items in a hierarchy, and I'm attempting to parse this list out into an actual hierarchy of objects. I'm using modified pre-order tree traversal to store/iterate through this list, ...
- 24.9k
23
votes
2
answers
17k
views
Counting number of children in hierarchical SQL data
for a simple data structure such as so:
ID parentID Text Price
1 Root
2 1 Flowers
3 1 Electro
4 2 Rose 10
5 2 ...
- 21.7k
22
votes
2
answers
18k
views
Getting hierarchy data from self-referencing tables
Let's say you have the following table:
items(item_id, item_parent)
... and it is a self-referencing table - item_parent refers to item_id.
What SQL query would you use to SELECT all items in ...
- 35k
21
votes
5
answers
5k
views
LINQ sort a flat list based on childorder
I am currently trying to figure out a good way to sort my elements with LINQ and C#, but I am kinda failing to do so.
For the problem let assume you have the following Table
---TempTable
ID (int)
...
- 7,541
20
votes
7
answers
37k
views
Is it possible to create a recursive query in Access?
I have a job table
Id
ParentID
jobName
jobStatus
The root ParentID is 0.
Is it possible in Access to create a query to find a root for a given job?
The database is MDB with no linked tables. The ...
- 1,930
20
votes
2
answers
5k
views
Ruby Exception or Error?
I have noticed that in the Ruby exception hierarchy, there are "errors" such as ArgumentError and there are "exceptions" such as SignalException. Is there a certain practise of naming exceptions? ...
- 4,308
19
votes
8
answers
49k
views
MySQL Recursive get all child from parent
i have this case using recursive query on Mysql to find lv 2 and lv3 child on one table...
database structure i'm using:
id name parent
1 A 0
2 B 0
3 C 0
4 D 1
5 E 1
6 ...
- 477
19
votes
1
answer
10k
views
Elasticsearch - using the path hierarchy tokenizer to access different level of categories
I'm very new in Elasticsearch and have a question about the hierarchical tokenizer of a path. Here is my code example:
My mapping code:
PUT /my_index
{
"settings": {
"analysis": {
"...
- 193
19
votes
1
answer
3k
views
Consistent approach for renaming namespaces in C++
When using nested namespaces sometimes fully qualified names end up being quite long. I know I can use namespace abc = aaa::bbb::ccc for reducing the amount of typing (it may also improve readability ...
- 19.5k
18
votes
4
answers
14k
views
How to find where an abstract method is implemented in Eclipse?
I would like to find where an abstract method is implemented, in which class? Is there a link in Eclipse like call hierarchy/open declaration or something like that that shows where the method ...
- 1,924
18
votes
3
answers
46k
views
MySQL - Recursing a tree structure
I have a database table which link locations together; a location can be in a location, which can be inside another location.
location (<id>, ....)
location_parent (<location_id>, <...
- 19.3k
18
votes
3
answers
40k
views
How to properly bind scope between directive and controller with angularJS
I'm trying to generate an n-level hierarchical unordered list with anugularJS, and have been able to successfully do so. But now, I'm having scope issues between the directive and controller. I need ...
- 275
18
votes
3
answers
7k
views
Can I bind a WPF TreeView to a single root node?
Say I have a binary tree, where the root of the data structure is just a tree node. For each node, the children are accessible through the Children property. Here's what I tried. The TreeRoot is a ...
- 99.2k
18
votes
2
answers
28k
views
Use d3 log scale instead of linear scale
I'm trying to do a chart based on http://mbostock.github.com/d3/talk/20111116/bar-hierarchy.html, the only difference being that I'd like to use a log scale for the x-axis.
Here's my fiddle: http://...
- 8,649
18
votes
8
answers
14k
views
How do you sort a tree stored using the nested set model?
When I refer to nested set model I mean what is described here.
I need to build a new system for storing "categories" (I can't think of better word for it) in a user defined hierarchy. Since the ...
Bernard
17
votes
5
answers
27k
views
Category Hierarchy (PHP/MySQL)
I am trying to get my all categories and sub-categories from MySQL database in a hierarchy:
My result should be like that (just example):
Cat A
Sub-Cat 1
Sub_Sub_Cat 1
...
- 3,187
17
votes
3
answers
35k
views
Flat PHP Array to Hierarchy Tree
I have an array with the following keys
id
parent_id
name
A sample array:
array(7) {
[0]=>
array(3) {
["id"]=>
string(1) "4"
["parent_id"]=>
string(1) "0"
["name"...
- 3,389
17
votes
1
answer
6k
views
Convert delimited string into hierarchical JSON with JQuery
I have an array of strings that describe the parent/child relationship by being delimited with dashes. So, if Bob's boss was Jim and Jim's boss was Fred, Bob's entry in the array would be "Fred-Jim-...
- 3,835
17
votes
1
answer
12k
views
Tree drawing orientation
I've made a slightly modified tree using the tree layout. I needed to orient the tree right-to-left instead of the regular left-to-right orientation that's the default. What is the right and proper d3:...
- 438
17
votes
5
answers
11k
views
Best practice for naming subclasses
I am often in a situation where I have a concept represented by an interface or class, and then I have a series of subclasses/subinterfaces which extend it.
For example:
A generic "DoiGraphNode&...
- 89.3k
17
votes
2
answers
9k
views
C++ : Multiple inheritance with polymorphism
(pardon the noob question in advance)
I have 4 classes:
class Person {};
class Student : public Person {};
class Employee : public Person {};
class StudentEmployee : public Student, public Employee {...
- 28.3k
16
votes
6
answers
15k
views
Is it good practice to often use instanceof?
The scenario. I'm writting game-related code. In that game a Player(its also a class) has a list of Item. There are other types of items that inherit from Item, for example ContainerItem, DurableItem ...
- 594
16
votes
2
answers
5k
views
Does ruby provide a method to show the hierarchy calls?
That's all, i want to see what are the clases that inherits a fixed class. There is a method for this in Ruby?
Aptana offers an option that shows this, but is there any method?
Thanks
- 1,093
16
votes
3
answers
25k
views
how to encode this data to parent / children structure in JSON
I am working with d3.js to visualise families of animals (organisms) (up to 4000 at a time) as a tree graph, though the data source could just as well be a directory listing, or list of namespaced ...
- 2,485
15
votes
9
answers
23k
views
Construct flat array from tree of objects
Suppose I have a tree of objects like the following, perhaps created using the excellent algorithm found here: https://stackoverflow.com/a/22367819/3123195
{
"children": [{
"id": 1,
...
- 3,658