Book Image

Julia Programming Projects

By : Adrian Salceanu
Book Image

Julia Programming Projects

By: Adrian Salceanu

Overview of this book

Julia is a new programming language that offers a unique combination of performance and productivity. Its powerful features, friendly syntax, and speed are attracting a growing number of adopters from Python, R, and Matlab, effectively raising the bar for modern general and scientific computing. After six years in the making, Julia has reached version 1.0. Now is the perfect time to learn it, due to its large-scale adoption across a wide range of domains, including fintech, biotech, education, and AI. Beginning with an introduction to the language, Julia Programming Projects goes on to illustrate how to analyze the Iris dataset using DataFrames. You will explore functions and the type system, methods, and multiple dispatch while building a web scraper and a web app. Next, you'll delve into machine learning, where you'll build a books recommender system. You will also see how to apply unsupervised machine learning to perform clustering on the San Francisco business database. After metaprogramming, the final chapters will discuss dates and time, time series analysis, visualization, and forecasting. We'll close with package development, documenting, testing and benchmarking. By the end of the book, you will have gained the practical knowledge to build real-world applications in Julia.
Table of Contents (19 chapters)
Title Page
Copyright and Credits
About Packt

Developing the game's web UI

Please start your favorite Julia editor and open the sixdegrees/ folder we used in the previous chapter. It should contain all the files that we've worked on already—six_degrees.jl, plus the Articles, Database, Gameplay, and Wikipedia modules.


If you haven't followed through the code up to this point, you can download this chapter's accompanying support files, which are available at

Add a new file for our web app. Since the code will be more complex this time and should integrate with the rest of our modules, let's define a WebApp module within a new WebApp.jl file. Then, we can add these first few lines of code:

module WebApp 
using HTTP, Sockets 
const HOST = ip"" 
const PORT = 8888 
const ROUTER = HTTP.Router() 
const SERVER = HTTP.Server(ROUTER) 

No surprises here—similar to the previous example, we define constants for...