Book Image

Learning Jupyter

By : Dan Toomey
Book Image

Learning Jupyter

By: Dan Toomey

Overview of this book

Jupyter Notebook is a web-based environment that enables interactive computing in notebook documents. It allows you to create and share documents that contain live code, equations, visualizations, and explanatory text. The Jupyter Notebook system is extensively used in domains such as data cleaning and transformation, numerical simulation, statistical modeling, machine learning, and much more. This book starts with a detailed overview of the Jupyter Notebook system and its installation in different environments. Next we’ll help you will learn to integrate Jupyter system with different programming languages such as R, Python, JavaScript, and Julia and explore the various versions and packages that are compatible with the Notebook system. Moving ahead, you master interactive widgets, namespaces, and working with Jupyter in a multiuser mode. Towards the end, you will use Jupyter with a big data set and will apply all the functionalities learned throughout the book.
Table of Contents (16 chapters)
Learning Jupyter
About the Author
About the Reviewer

Node.js asynchronous threads

Node.js has built-in mechanisms for creating threads and having them fire asynchronously. Using an example from, we have the following:

//thread function - invoked for every number in items array
function async(arg, callback) {
  console.log('cube ''+arg+'', and return 2 seconds later');
  setTimeout(function() { callback(arg * 3); }, 2000);
//function called once - after all threads complete
function final() { console.log('Done', results); }
//list of numbers to operate upon
var items = [ 0, 1, 1, 2, 3, 5, 7, 11 ];
//results of each step
var results = [];
//loop the drives the whole process
items.forEach(function(item) {
  async(item, function(result){
    if(results.length == items.length) {

This script creates an asynchronous function that operates on a number. For every number (item), we call upon the inline function passing the number to the function that applies...