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

Understanding HTML documents

In order to extract data from the fetched web pages, we need to isolate and manipulate the structural elements that contain the desired information. That's why a basic understanding of the generic structure of the web pages is helpful when performing web scraping. If you've done web scraping before, maybe using a different programming language, or if you just know enough about HTML documents, feel free to skip this section. On the other hand, if you're new to this or just need a quick refresher, please read on.

Hypertext Markup Language (HTML) is the gold standard for creating web pages and web applications. HTML goes hand in hand with HTTP, the protocol for transmitting HTML documents over the internet.

The building blocks of HTML pages are the HTML elements. They provide both the content and the structure of a web page. They can be nested to define complex relationships with each other (such as parents, children, siblings, ancestors, and so on). HTML elements...