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

Setting up our game's architecture

Let's create a home for our game—make a new folder called sixdegrees/. We'll use it to organize our game's files. Each file will contain a module and each module will package related functionality. We'll make use of Julia's auto-loading features, which means that the filename of each module will be the same as the module's name, plus the .jl extension.

The first thing we need to do, though, once we go into the sixdegrees/ folder, is to initialize our project through Pkg—so we can use Julia's dependency management features:

julia> mkdir("sixdegrees") 
julia> cd("sixdegrees/") 
julia> ] # go into pkg mode 
(v1.0) pkg> activate . 
(sixdegrees) pkg>

We'll be using the HTTP and the Gumbo packages, so it's a good idea to add them, now that we're dealing with dependencies:

(sixdegrees) pkg> add HTTP Gumbo

The next thing we need is a container for Wikipedia-related code—a module that encapsulates the functionality for requesting...