node4j | Using node.js from Java , NetBeans and JShell | Runtime Evironment library
kandi X-RAY | node4j Summary
kandi X-RAY | node4j Summary
Using node.js from Java, NetBeans and JShell
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Top functions reviewed by kandi - BETA
- Initialize presenter
- Start a server
- Find the executor
- Executes a command
- Finds an object
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Trending Discussions on node4j
QUESTION
I created a Graph Database in neo4j, my main interest with this database is to find the cheapest teleport paths between towns on a MMORPG world. Here is the script to build up the database:
https://gist.github.com/sergio-bobillier/1effa24d406e84afe0976277d04c0218
As you can see the nodes in the graph have a LOT of connections between them, this is because all the major towns are connected between them.
I use the Dijkstra algorithm to get the cheapest path like this:
MATCH (s {name: 'Talking Island Village'}), (t {name: 'Town of Oren'})
CALL apoc.algo.dijkstra(s, t, 'HAS_A_PORT_TO>', 'cost') YIELD path, weight
RETURN path LIMIT 1
This works great, the algorithm returns the correct path but there is something that bothers me, when the neo4j browser plots the path at first it plots only the path returned by the algorithm, however it quickly "completes" the graph by plotting all the connections between the nodes (even those not included in the path returned by Dijkstra), which makes the plotted graph really confusing:
How can I keep node4j from plotting all these extra relationships and include only the path returned by the Dijkstra algorithm?
...ANSWER
Answered 2018-Apr-08 at 22:20It looks like that in the neoj browser settings you need to turn off the option Browser Settings -> Graph Visualization -> Connect result nodes
.
QUESTION
Let's say you have a neo4j graph that has 100,000 "color" nodes and 50,000 "painting" nodes. Each painting node has a "contains" relationship with 50 to 100 of the colors. Lets also say you 200 "aggregate color" nodes each with a relationship with ~ 1000 colors. The aggregate color nodes contain a scalar weight. Finally, you create a "palette" node with a relationship with 10 - 20 aggregate colors.
I want a node4j cypher query that identifies the top 10 painting with the highest weighted sum of aggregated colors based on the colors in the painting.
Let
...ANSWER
Answered 2018-Mar-21 at 22:50Your query has a couple of bugs. The first MATCH
should be looking for an aggregates
relationship (not a contains
relationship) between a
and c
. And the first WITH
clause is not passing the c
value forward.
Here is a simplified and more efficient form of that query:
QUESTION
I am trying to change log time this date time format [2017-05-23 12:05:37.327] into this 23-May-17 12:05:37. I am using this package: https://www.npmjs.com/package/log4js
Here is file configuration of node4js.
...ANSWER
Answered 2017-May-30 at 13:19Here is a sloution:
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Install node4j
You can use node4j like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the node4j component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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