NPM run parallel task, but wait until resource is available to run second task

You can try concurrently with wait-on package in order to manage conccurent/sequential scripts and outputs. wait-on sequential launches support head response status, tcp listening, … For example : “scripts”: { “start”: “concurrently -k -n \”DB,API,WEB\” -c \”blue,magenta,yellow\” \”npm run start-db\” \”npm run start-api\” \”npm run start-web\””, “start-db”: “myDbServerCmd”, “start-api”: “wait-on tcp:27017 && myApiServerCmd”, “start-web”: “myFrontServerCmd”, … Read more

How can one modify the outline color of a node In networkx?

UPDATE (3/2019): as of networkx 2.1, the kwargs are forwarded from draw(), so you should be able to simply call draw() with the edge_color kwarg. Ok, this is kind of hacky, but it works. Here’s what I came up with. The Problem networkx.draw() calls networkx.draw_networkx_nodes(), which then calls pyplot.scatter() to draw the nodes. The problem … Read more

What is a node in Javascript?

A “node”, in this context, is simply an HTML element. The “DOM” is a tree structure that represents the HTML of the website, and every HTML element is a “node”. See Document Object Model (DOM). More specifically, “Node” is an interface that is implemented by multiple other objects, including “document” and “element”. All objects implementing … Read more

What is the difference between node.nextSibling and ChildNode.nextElementSibling?

nextElementSibling always returns an element. nextSibling can return any kind of node. They are the same for your example, but different in other cases, e.g.: <p><span id=”span-01″>Here is span-01</span> Some text at the top level <span id=”span-02″>Here is span-02</span></p> In this case, document.getElementById(‘span-01’).nextElementSibling is span-02, but document.getElementById(‘span-01’).nextSibling is the text node containing “Some text at … Read more

How to swap DOM child nodes in JavaScript?

There is no need for cloning. You can just move one node before the other. The .insertBefore() method will take it from its current location and insert it somewhere else (thus moving it): childNode[4].parentNode.insertBefore(childNode[4], childNode[3]); You get the parent of the node. You then call the insertBefore method on the parent and you pass it … Read more

Graph auto-layout algorithm

You will find http://graphdrawing.org/ and this tutorial, by Roberto Tamassia, professor at Brown University, quite helpful. I like a lot Force-Directed Techniques (pp. 66-72 in the tutorial) like the Spring Embedder. You assume there is a spring or other force between any two adjacent nodes and let nature (simulation) do the work 🙂