adjacency-list Questions
3
Solved
I am working hierarchical data, as in the tree structure. i want to know what is the best way to store them in database.
I started with adjacency list, in MySQL. But the performance seems to dip a...
Woodworker asked 14/5, 2014 at 6:14
7
Solved
I have a directed graph in which I want to efficiently find a list of all K-th order neighbors of a node. K-th order neighbors are defined as all nodes which can be reached from the node in questio...
Zymotic asked 23/8, 2013 at 2:45
4
Solved
In CLRS excise 22.1-8 (I am self learning, not in any universities)
Suppose that instead of a linked list, each array entry Adj[u] is a
hash table containing the vertices v for which (u,v) ∈ E....
Mealtime asked 12/3, 2012 at 13:7
1
Solved
I want to define a model that has a self-referential (or recursive) foreign key using SQLModel. (This relationship pattern is also sometimes referred to as an adjacency list.) The pure SQLAlchemy i...
Fiddlestick asked 19/8, 2022 at 16:59
2
Solved
I have been looking into Adjacency List and Nested Set Model to find the optimal tree solution.
Up until now I thought one of the main advantages of Nested Set Model was that I could use one SQL q...
Taconite asked 13/11, 2010 at 17:39
4
Solved
in my MySQL schema, I have the category(id, parentid, name) table
In the MSSQL, I have that CTE query (to build a category tree from the bottom up for a supplied category ID:
with CTE (id, pid, n...
Dannie asked 12/1, 2012 at 10:29
1
Solved
I heard that adjacency lists are used in most graph algorithms (but not all). I'm just wondering what algorithms prefer adjacency matrices and why?
So far I’ve found that Floyd Warshall uses adjace...
Interrelated asked 27/6, 2020 at 13:26
3
Solved
so I'm creating a class that implements an adjacency list. Currently in my class definition I initialized two vectors:
vector<vector<int>> adjList;
vector<int> neighbors;
and I...
Triglyceride asked 2/12, 2014 at 3:2
1
Solved
I'd like to represent a wiki (a set of documents comprising a directed graph) in Dhall. These documents will be rendered to HTML, and I'd like to prevent broken links from ever being generated. As ...
Annemarie asked 26/2, 2020 at 22:41
1
Solved
I am searching for an efficient solution to build a secondary in-memory index in Python using a high-level optimised mathematical package such as numpy and arrow. I am excluding pandas for performa...
Cesya asked 26/1, 2020 at 12:45
5
Solved
Lists consume most of their time in allocating memory when pushing_back. On the other hand, vectors have to copy their elements when a resize is needed. Which container is, therefore, the most effi...
Hat asked 26/3, 2011 at 6:17
3
Solved
I have the following schema for the tags table:
CREATE TABLE tags (
id integer NOT NULL,
name character varying(255) NOT NULL,
parent_id integer
);
I need to build a query to return the follo...
Tamratamsky asked 12/12, 2014 at 7:18
1
Solved
Context
I am building a forum and investigating modeling the data with DynamoDB and adjacency lists. Some top-level entities (like users) might have multiple types of relationships with other top-...
Cardiganshire asked 18/11, 2018 at 6:17
2
Solved
I was looking for different Data structures for representing Graph and I came accross Nvidia CUDA Toolkit and found out new way to represent graph with the help of source_indices, destination_offse...
Weinstock asked 2/4, 2018 at 13:56
2
Solved
I am completing an exercise using DynamoDB to model a many to many relationship. I need to allow a many to many relationship between posts and tags. Each post can have many tags and each tag can ha...
Paediatrician asked 26/6, 2018 at 21:31
6
Solved
I am working on an assignment where one of the problems asks to derive an algorithm to check if a directed graph G=(V,E) is singly connected (there is at most one simple path from u to v for all di...
Packhorse asked 24/3, 2010 at 20:50
11
What is better, adjacency lists or adjacency matrix, for graph problems in C++?
What are the advantages and disadvantages of each?
Encroach asked 7/2, 2010 at 20:59
5
Solved
Hello all :) Today I am refining my skills on graph theory and data structures. I decided to do a small project in C++ because it's been a while since I've worked in C++.
I want to make an adjace...
Profusion asked 1/3, 2014 at 21:31
2
Solved
Say I have two options for generating the Adjacency Matrix of a network: nx.adjacency_matrix() and my own code. I wanted to test the correctness of my code and came up with some strange inequalitie...
Marika asked 19/5, 2016 at 17:15
1
Solved
I am going through this link for adjacency list representation.
http://www.geeksforgeeks.org/graph-and-its-representations/
I have a simple doubt in some part of a code as follows :
// A utility...
Slackjawed asked 8/7, 2017 at 6:56
3
Solved
Hello I understand the concepts of adjacency list and matrix but I am confused as to how to implement them in Python:
An algorithm to achieve the following two examples achieve but without knowing...
Luddite asked 25/11, 2012 at 0:29
4
I'm doing interview prep and reviewing graph implementations. The big ones I keep seeing are adjacency list and adjacency matrices. When we consider the runtime of basic operations, why do I never ...
Grocery asked 20/8, 2013 at 0:31
4
Solved
My problem is very simple: I need to create an adjacency list/matrix from a list of edges.
I have an edge list stored in a csv document with column1 = node1 and column2 = node2 and I would like t...
Zeitgeist asked 16/5, 2013 at 10:25
3
So I have an SQL query to retrieve all the children of a given node in an adjacency list.
WITH RECURSIVE
q AS
(
SELECT id, name
FROM categories h
WHERE id = 11846801
UNION ALL
SELECT hc.id,...
Conjoined asked 4/2, 2013 at 22:23
1
Solved
I want to use boost's dijkstra algorithm (since I'm using boost in other parts of my program). The problem I'm having is adding custom objects (I believe they are referred to as property) to the ad...
Harbot asked 10/3, 2015 at 20:8
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